The significance of the study lies in a distinction that is often overlooked in public discussions of coral bleaching. When a reef survives a heatwave, headlines tend to celebrate survival itself. But as lead author David Juszkiewicz, a PhD candidate in Curtin’s Coral Conservation and Research Group, explains, survival is only half the equation. A damaged reef does not recover merely because some of its corals remain alive; it recovers because those surviving colonies produce eggs and sperm, fertilize them, and release larvae that settle, grow, and gradually rebuild the three-dimensional structure that thousands of other species depend on. Without successful reproduction, even a reef full of living corals is, in demographic terms, a population with no future.

This is why knowing the reproductive calendar of reef-building corals matters so much. Coral spawning is a remarkably synchronized phenomenon: colonies of the same species release their gametes in coordinated bursts, often tied to lunar cycles, water temperature, and other environmental cues. If scientists do not know when a given species spawns, they cannot measure whether that species is reproducing successfully after a disturbance, cannot detect sublethal heat stress that suppresses fertility, and cannot plan restoration work that depends on collecting eggs and larvae at precisely the right moment. The Curtin team set out to close that knowledge gap for Ningaloo’s most important reef-builders.

The researchers examined 20 massive coral colonies drawn from across Ningaloo Reef, focusing on the genus Porites, a group of slow-growing, long-lived corals that create and maintain much of the structural habitat throughout the Indo-Pacific. These corals can form enormous boulder-like colonies that persist for centuries, making them both ecological cornerstones and valuable archives of environmental history. By sampling the reproductive tissues of these colonies, the team could determine whether individual corals were developing eggs and sperm and therefore preparing to spawn.

The results revealed a clear pattern for two of the three species studied. Porites lutea and Porites lobata, both major contributors to reef construction at Ningaloo, showed evidence that they were preparing to spawn during the reef’s annual early autumn mass spawning period. This finding establishes the first reproductive baseline for these species at the site, giving scientists and managers a reference point against which future reproductive activity can be measured. If marine heatwaves strike the region in coming years, researchers will be able to return to these corals and assess whether their reproductive output has declined, a far more sensitive indicator of long-term reef health than survival alone.

The third species told a different story. Porites australiensis showed no signs of reproduction during either of the team’s sampling periods, suggesting that it may spawn at a different time of year entirely. That possibility raises an important complication: some of Ningaloo’s major reef-building corals may not follow the reproductive schedules assumed from studies elsewhere. The implication is that year-round monitoring of reproductive activity will be needed to build a complete picture of how different species contribute to reef recovery and how they respond, individually, to thermal stress. A single annual spawning survey could easily miss the reproductive peak of a species that breeds outside the conventional window.

Perhaps the most striking finding concerns geography. Ningaloo’s Porites corals appear to reproduce in early autumn, whereas populations of the same species recorded further north, near Dampier on the Pilbara coast, have been observed spawning in late spring and early summer. That seasonal offset is more than a curiosity. As senior author Associate Professor Zoe Richards, leader of the Coral Conservation and Research Group in Curtin’s School of Molecular and Life Sciences, points out, if Ningaloo’s corals are reproductively isolated from reefs just 300 kilometres to the north, those northern populations may be unable to replenish Ningaloo if its corals are lost to heatwaves or cyclones. The two regions would effectively function as separate genetic stocks, despite their relative proximity, meaning that larval connectivity between them cannot be assumed when planning conservation at a regional scale.

The practical consequences for restoration programs are immediate. Many modern reef restoration efforts rely on capturing coral spawn during spawning events, rearing the larvae, and resettling them onto degraded reef areas. Timing is everything in this work. If scientists miss a spawning event, they may have to wait an entire year for the next opportunity to collect reproductive material. A reliable reproductive calendar for keystone species like Porites lutea and Porites lobata allows managers to plan collection expeditions, laboratory work, and outplanting schedules with confidence, rather than gambling on an uncertain window. The new baseline transforms what was previously guesswork into a scheduled, repeatable operation.

Independent experts have welcomed the benchmark. Dr Thomas Holmes, Program Manager for the WA Reef Regen Program at the Western Australian Marine Science Institution, who was not involved in the study, emphasized that heat stress does not simply determine whether corals live or die. It can also reduce reproduction, meaning corals may produce fewer eggs and sperm for years after a major bleaching event. That delayed fertility cost makes reproduction one of the most important indicators of a reef’s long-term health and resilience. With a baseline now established for some of Ningaloo’s most important reef-builders, any future heatwave impact on the region can be assessed against measurable reproductive data, informing coral regeneration activities with evidence rather than assumption.

The project was undertaken with funding from the Minderoo Exmouth Research Station and involved co-authors from the Curtin University Medical Research Institute, James Cook University and The University of Western Australia. As climate change continues to push ocean temperatures upward, the study underscores a broader lesson for reef science: recovery is a reproductive process, not just a survival outcome. Reefs cannot rebuild themselves unless their corals successfully produce the next generation, and protecting that capacity requires knowing exactly when, where, and how it happens. For Ningaloo, the clock has finally been read; for reefs elsewhere, the message is that similar baselines are urgently needed before the next marine heatwave arrives.

Subject of Research: Reproductive timing and spawning patterns of massive Porites corals at Ningaloo Reef, Western Australia

Article Title: New insights into coral reproductivity could help protect our reefs

Article References: New insights into coral reproductivity could help protect our reefs. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: coral reproduction, Ningaloo Reef, Porites, coral spawning, marine heatwaves, reef recovery, coral restoration, Curtin University, Marine Biology, reef resilience, Western Australia, larval connectivity

Corallivores, animals that eat live coral tissue, occupy an ambivalent position on reefs. At least 128 fish species from 11 families feed on coral polyps, mucus, and skeleton, forming an important pathway that channels the energy produced by the corals’ photosynthetic symbionts up the food web. Yet skeletal-feeding species such as pufferfish, parrotfish, and some triggerfish bite off chunks of skeleton along with the tissue, leaving lesions that cost corals energy to repair, potentially reducing growth and reproduction, and sometimes acting as vectors for coral disease. On healthy reefs, these effects are generally considered modest, because corals can defend themselves and regrow. After a disturbance, however, the equation changes: with fewer colonies remaining, the feeding pressure concentrated on each survivor can rise sharply, raising concerns that corallivores might slow reef recovery precisely when it matters most.

Pufferfish are particularly well equipped for this kind of predation. Their beak-like tooth plates, fused into four powerful cutting surfaces and driven by strong jaw muscles, allow them to shear through hard-bodied prey of nearly any kind. At least five Arothron species are known to eat corals. Despite this, most evidence for their diets has come from snapshot gut-content analyses of dead specimens, and detailed field observations have focused almost entirely on Arothron meleagris in the tropical eastern Pacific, where coral diversity is low. How Arothron pufferfishes behave on the species-rich reefs of the western Pacific, and how they respond to bleaching, remained largely unknown until now.

Mei Kubota, Hajime Sato, and Yoichi Sakai of Hiroshima University conducted their observations between 2023 and 2025 on a protected shallow reef in front of Sesoko Station, covering roughly 2.56 hectares at depths of one to five meters. Because A. nigropunctatus bears distinctive black spot patterns, the team could identify individuals photographically and track the same fish across years, a methodological advantage that allowed them to account for individual differences in feeding preferences. Snorkeling observers kept a distance of at least five meters and discarded the first minutes of each session to avoid disturbing the wary fish. Across 190 observation sessions totaling 6,064 minutes, they recorded bites on hard corals, the epilithic algal matrix, sponges, and sand-buried prey, along with movement patterns tracked by handheld GPS.

The baseline picture, gathered in 2023 when the reef was relatively healthy, showed a flexible omnivore rather than a coral specialist. The pufferfish fed mainly on Acropora and Porites corals but also bit the epilithic algal matrix, a complex of filamentous algae and cyanobacteria, dug sand-buried invertebrates by jetting water from their mouths, and occasionally took sponges. Activity was remarkably even across the day, with swimming occupying nearly 78 percent of observation time and no significant diel pattern in feeding. The fish showed no territoriality, moved hundreds of meters during half-hour watches, and never displayed aggression toward one another. Fecal analysis confirmed the observational data: Acropora dominated the diet by both weight and frequency of occurrence before bleaching.

Then came 2024. From July to September, seawater temperatures around Sesoko Island reached record highs, triggering a mass bleaching event. At a nearby reef, coral cover collapsed from 70 percent to under 5 percent within months, and at the study site nearly all Acropora colonies eventually died. The researchers had, by accident of timing, a natural experiment. Dividing their data into four phases, one year before bleaching, immediately before, during, and one year after, they fitted generalized linear mixed models to the bite counts, using observation time as an offset and individual identity as a random effect.

The results were striking. Bites on Acropora, which had averaged about 6.5 per 30 minutes in 2023, fell to nearly zero during bleaching and remained almost absent a year later, with the only two feeding events recorded in 2025 directed at small juvenile colonies sheltering under rocks. Notably, the pufferfish never bit bleached Acropora colonies at all. Feeding on Porites, a more bleaching-resistant genus, stayed stable throughout. Meanwhile, bites on other scleractinian corals such as Lobophyllia and Favites increased significantly, and feeding on the epilithic algal matrix surged to roughly seven times the pre-bleaching rate. Water-blowing on sandy patches, used to expose buried prey, declined to zero, suggesting that heat stress may have disturbed the sand-dwelling fauna as well. The pufferfish even began biting Chalinula nematifera, a sponge that can overgrow and kill corals, a predation event the authors believe has never been reported before.

Perhaps the most intriguing observation concerns how the pufferfish handle sediment-laden algal turfs. These mats, which accumulate heavy sediment loads after disturbances, are known to inhibit coral larval settlement and to suppress feeding by many herbivorous fishes, which tend to swallow calcium carbonate sediment along with the algae. The researchers watched A. nigropunctatus bite the algal matrix, hold it in its mouth, and expel the sediment, effectively separating food from grit. Because pufferfish lack the pharyngeal crushing apparatus of parrotfish and routinely ingest calcified prey, they may be unusually tolerant of sediment. The authors hypothesize that this could give the species a previously overlooked functional role: removing sediment-laden turf and creating gaps in the substrate that coral larvae could colonize, a service that typical herbivorous fishes may not readily replicate.

The study also quantifies how little coral these fish actually remove. Using the mean dry mass of fecal fragments and average bite rates, the team estimated that each pufferfish consumes about 7.9 grams of coral skeleton per day, or roughly 2.9 kilograms per year. At the observed density of 8.7 individuals per hectare, that amounts to about 25 kilograms of coral per hectare annually, equivalent to just 2.5 grams of calcium carbonate per square meter, far below rates reported for A. meleagris in the eastern Pacific and small relative to coral calcification rates in Okinawa. The authors caution that their estimates are minimums, since fragments may be abraded during digestion, and that coral skeletons can persist in the gut for weeks, which may explain why earlier gut-content studies overestimated the species’ dependence on coral.

Taken together, the findings recast the blackspotted pufferfish as a facultative corallivore whose flexible foraging may buffer it through disturbances rather than amplify them. Instead of concentrating on the few surviving colonies after bleaching, as feared, the fish shifted toward algae and other resources, and its total coral consumption appears too low to hinder reef recovery. Whether the dietary shift carries hidden costs, such as reduced growth or reproduction in the medium term, remains an open question, as does the precise mechanism behind the avoidance of bleached Acropora. But on a reef still reeling from record heat, the pufferfish’s plasticity offers a rare note of ecological nuance: a coral predator that, in the short term at least, appears to step aside, and may even lend a jaw, when the reef needs room to rebuild.

Subject of Research: Foraging behavior and dietary flexibility of the facultative corallivorous pufferfish Arothron nigropunctatus in response to mass coral bleaching on Okinawan reefs

Article Title: Foraging behavior and short-term response to mass coral bleaching by the facultative corallivorous pufferfish Arothron nigropunctatus in Okinawa, western Pacific

Article References: Kubota, M., Sato, H., & Sakai, Y. (2026). Foraging behavior and short-term response to mass coral bleaching by the facultative corallivorous pufferfish Arothron nigropunctatus in Okinawa, western Pacific. Coral Reefs. https://doi.org/10.1007/s00338-026-02961-5

Image Credits: AI Generated

DOI: 10.1007/s00338-026-02961-5

Keywords: coral bleaching, pufferfish, Arothron nigropunctatus, corallivory, Okinawa, epilithic algal matrix, dietary shift, reef recovery, behavioral ecology, Acropora, Porites, Tetraodontidae

Under normal, background conditions with little or no heat stress, the study found that survival of small corals varied considerably among reefs but followed a familiar ecological pattern known as Type III survivorship, in which mortality is highest among the smallest individuals and declines as colonies grow. Annual survival probabilities ranged from 0.43 at Ningaloo Reef, to 0.65 at Mermaid Reef, to a remarkable 0.92 at Scott Reef, where favourable habitat conditions, abundant crustose coralline algae, good water quality and healthy fish stocks supported unusually high survival across all size classes. At every reef studied under background conditions, larger colonies within the small-coral size range had consistently better odds of surviving than their tinier neighbours, confirming that size remains a powerful predictor of fate even within this narrow band of early life stages.

The critical twist emerged when the researchers compared these baseline patterns with data collected during and after the most severe marine heatwave ever recorded in the region, which struck the reefs off north-western Australia in late 2024 and early 2025. The team used Degree Heating Weeks, a standard satellite-based metric of accumulated thermal stress, to quantify the intensity of heat exposure at each reef. At Ashmore Reef, where heat stress reached 13 Degree Heating Weeks and produced a moderate bleaching event affecting roughly 30 percent of adult corals, small coral survival held steady at 0.67 per year, a figure comparable to background survival at other reefs. This finding suggests that juvenile corals may retain considerable resilience during moderate bleaching events, even when their adult counterparts suffer visible damage.

Mermaid Reef told a very different story. There, heat stress of 11 Degree Heating Weeks, the highest ever recorded at that reef in both magnitude and duration, triggered severe mass bleaching affecting more than 75 percent of corals, along with substantial mortality. In the six months following the event, the probability of survival for small corals plummeted to just 0.21, a figure the authors note is likely conservative because monitoring covered only half a year, meaning mortality over a full year would probably have been higher. The odds of survival at Mermaid Reef were 35 percent lower following the severe bleaching event than under background conditions at the same reef, and the difference was statistically robust across pairwise comparisons with every other reef and heat-stress level in the study.

Perhaps the most striking discovery was what happened to the relationship between colony size and survival under extreme heat. Under background conditions and even after moderate bleaching, survival rose steadily with colony size, exactly as ecological theory predicts. But after the severe bleaching event at Mermaid Reef, this size-dependent survival collapsed entirely for the structurally complex, bleaching-susceptible taxa. For Acropora species, the relationship actually reversed: colonies that were one centimetre larger had 20 percent lower odds of survival, with survival probability falling from 0.22 for the smallest colonies to just 0.04 for those approaching 9 centimetres. Pocillopora showed a similar pattern, with survival declining from 0.24 to effectively zero across the size range, although the researchers caution that only one of 19 monitored Pocillopora colonies survived, making the estimate highly uncertain.

The mechanism behind this reversal likely lies in colony morphology and the physics of mass transfer, the process by which corals shed the toxic byproducts of bleaching. When branching corals such as Acropora and Pocillopora are small and flat, water flow penetrates the colony effectively and boundary layers remain thin, allowing efficient exchange. As these colonies grow and become more structurally complex, boundary layers thicken and internal flow diminishes, reducing mass-transfer efficiency and increasing susceptibility to thermal stress. Massive corals such as Goniastrea and Porites, by contrast, maintain a simple dome-like shape throughout their lives, sustaining more stable flow conditions and less size-specific variation in vulnerability. The researchers acknowledge that other factors correlated with size, including age, growth history and genotype, could also contribute, and their observational design cannot fully disentangle these effects.

Taxonomic differences in survival mirrored patterns long documented for adult corals, suggesting that life-history traits consistently mediate thermal susceptibility from the earliest stages onward. Fast-growing, thin-tissued taxa in the families Acroporidae and Pocilloporidae consistently showed lower survival than the slower-growing, thick-tissued massive and encrusting corals of the families Merulinidae and Poritidae. At Mermaid Reef, survival of Acropora fell from 0.59 under background conditions to 0.10 after severe bleaching, Isopora dropped from 0.55 to zero, and Pocillopora fell from 0.51 to 0.02. Goniastrea and Porites also declined, from 0.80 to 0.37 and 0.78 to 0.51 respectively, but they retained their positive size-survival relationship even under extreme heat. Averaged across taxa, the gap in survival between susceptible and resistant groups widened from 0.24 under background conditions to 0.40 after severe bleaching, indicating that extreme events disproportionately eliminate the reef-builders most important for structural complexity.

These findings carry significant implications for how scientists model the future of coral reefs. Population models that project reef dynamics under climate change have often relied on uncertain assumptions about small corals, with some assuming that all sizes die equally under heat stress and others assuming that colonies below a certain size threshold do not die at all. The new data demonstrate that neither assumption holds universally: the relationship between bleaching mortality and colony size varies among taxa, depends on location and environmental context, and shifts non-linearly with heat-stress severity. By providing size- and taxa-specific survival benchmarks across a gradient of thermal stress, the study gives modellers the empirical foundation needed to identify the most influential life stages and generate more reliable forecasts of population trajectories.

The research also offers practical guidance for the growing field of coral restoration, which increasingly focuses on deploying small corals and coral recruits on artificial substrates. Because baseline survival rates of small corals on natural reefs had been poorly resolved, practitioners have lacked a yardstick for judging whether survival on artificial structures is adequate. The survival rates documented here on natural substrata, which are generally higher than those reported from degraded reefs or artificial substrates in previous studies, provide exactly those benchmarks. The authors emphasise that while only deep cuts in greenhouse gas emissions can address the root cause of intensifying marine heatwaves, detailed demographic data of this kind are essential for targeting management interventions, evaluating restoration performance, and supporting the survival of the smallest corals through the demographic bottleneck that will increasingly determine whether reefs can recover in a warming world.

Subject of Research: Size- and taxa-specific survival of small corals under varying marine heatwave intensity in the eastern Indian Ocean

Article Title: Marine heatwaves reshape survival of small corals, revealing size- and taxa-specific vulnerabilities

Article References: Baker, M.-M., Cresswell, A. K., Logan, M., Ryan, N. M., Renton, M., Grimaldi, C. M., Sahin, D., Pygas, D., & Gilmour, J. P. (2026). Marine heatwaves reshape survival of small corals, revealing size- and taxa-specific vulnerabilities. Coral Reefs. https://doi.org/10.1007/s00338-026-02958-0

Image Credits: AI Generated

DOI: 10.1007/s00338-026-02958-0

Keywords: coral reefs, marine heatwaves, coral bleaching, juvenile coral survival, Degree Heating Weeks, Acropora, Pocillopora, Porites, Goniastrea, size-structured demography, reef restoration, Indian Ocean

The scale of the effort was itself remarkable. India’s reefs are dispersed across vastly different oceanographic settings: the coral atolls of Lakshadweep in the Arabian Sea, the fringing and patch reefs of the Gulf of Mannar, Palk Bay and Goa on the mainland, and the islands of the Maldives-adjacent Andaman archipelago in the Bay of Bengal, including the Mahatma Gandhi Marine National Park (MGMNP). Data on mass bleaching impacts across South Asia have historically been sparse, leaving the region largely invisible in global assessments. By mobilizing a network of scientists, dive operators and trained citizen observers, the research team assembled standardized observations of bleaching and mortality across most of the subcontinent’s major reef areas during a single, globally significant thermal anomaly. The result is a rare, region-wide snapshot of how a mass bleaching event unfolds across an entire nation’s reef estate.

The study’s central metric was degree heating weeks, or DHW, the standard satellite-derived measure of accumulated heat stress that underpins global bleaching forecasting systems such as NOAA’s Coral Reef Watch. As expected, bleaching intensity generally increased with accumulated heat stress. But the strength of that relationship varied dramatically from region to region, exposing the limits of DHW as a universal predictor of reef damage. Two reefs exposed to similar thermal loads could emerge with profoundly different outcomes, a finding that echoes a growing body of evidence that global forecast models need regional and temporal calibration if they are to serve as reliable early-warning tools for reef managers.

Nowhere was this regional variability starker than in the contrast between Lakshadweep and the Mahatma Gandhi Marine National Park. Lakshadweep emerged as the hardest-hit region in the country, with up to 37 percent of coral cover bleached or dead even at intermediate levels of heat stress. The oceanic atolls, which sit in the open Arabian Sea with little local protection from sustained warming, appear to have offered their corals no thermal escape. In sharp contrast, MGMNP in the Andaman Islands recorded only 11.5 percent bleaching or mortality, despite experiencing significant heat stress. The authors attribute this striking difference to regional oceanographic processes capable of creating mesoscale thermal refugia, localized zones where currents, internal waves or other physical mechanisms buffer reefs from the worst of the heat. Previous work in the Andaman Sea has shown that large-amplitude internal waves can deliver pulses of cooler water to reef surfaces during thermal stress, and the new findings lend further weight to the idea that such hidden refugia may be decisive in determining which reefs survive the coming decades.

The taxonomic story proved equally compelling. Across all regions, the branching and plating genera Acropora, Pocillopora, Galaxea and Montipora emerged as the most affected, consistent with the canonical hierarchy of bleaching susceptibility established in reefs worldwide. These fast-growing, structurally complex corals are the architectural engineers of Indo-Pacific reefs, and their disproportionate losses carry cascading consequences for fish habitat, carbonate production and reef growth. At the other end of the spectrum, the massive and encrusting genera Pavona, Platygyra, Goniastrea and Favites were among the least affected, their thick tissues and stress-tolerant symbionts once again proving their worth under thermal duress. For reef managers, this hierarchy has long served as a rough rule of thumb for anticipating post-bleaching community composition.

But Palk Bay broke the rule in spectacular fashion. In this shallow, turbid bay on India’s southeastern coast, the study documented a near-complete reversal of canonical genus-level susceptibilities. The ordinarily vulnerable Acropora colonies showed only modest bleaching or mortality, at 13.6 percent, while the ordinarily resistant Porites colonies suffered a staggering 61.8 percent mortality. Such a reversal is rare and scientifically provocative. It suggests that local conditions in Palk Bay, possibly including prior exposure to recurrent heat stress, the presence of thermally tolerant Symbiodiniaceae symbionts such as Durusdinium, or the moderating effects of turbidity, have reshaped the thermal tolerances of its coral communities in ways that global generalizations cannot capture. It also serves as a cautionary tale: resistance traits are context-specific, and a genus that survives in one reef region may collapse in another.

The mechanistic implications reach deep into coral biology. Bleaching occurs when heat-stressed corals expel or lose the photosynthetic symbiotic algae living in their tissues, starving the coral animal of its primary energy source. Whether a coral bleaches, recovers or dies depends on an interplay of factors: the symbiont types it hosts, its history of thermal exposure, the energy reserves it carries into the event, and the physical environment surrounding it. High-frequency temperature variability, for instance, is known to reduce bleaching risk by priming coral physiological responses, while chronic local stressors can erode resilience. The Indian study’s regional contrasts, Lakshadweep’s open-ocean exposure versus MGMNP’s wave-buffered refugia, Palk Bay’s turbid, heat-conditioned waters versus the clearer reefs of the Gulf of Mannar, provide a natural experiment in how these mechanisms play out at landscape scale.

The findings arrive at a sobering moment. The fourth global bleaching event has confirmed what many reef scientists feared: that warming-driven bleaching is no longer episodic but is ushering in an era of near-annual thermal stress, with global warming tripling the persistence of marine heatwaves and intensifying them by roughly a degree Celsius. For India, the stakes are concrete. Lakshadweep’s atolls support island communities whose shorelines depend on reef-derived sediment, and studies have warned that most atolls may become increasingly uninhabitable by mid-century as sea-level rise exacerbates wave-driven flooding. The loss of up to 37 percent of coral cover in a single event, at only intermediate heat stress, signals that these reefs may have less thermal headroom than their Maldivian and Chagos neighbors, and that recovery between now and the next event is far from guaranteed.

Yet the study is not simply a eulogy. The survival of MGMNP’s reefs, the unexpected toughness of Palk Bay’s Acropora, and the resilience of massive genera across the country collectively point to genuine, mappable refugia and resistance hotspots that could anchor conservation planning. The authors argue that local oceanography and context-specific resistance patterns must be integrated into national and global assessments of bleaching impacts, rather than relying on heat-stress metrics alone. Protecting the oceanographic processes that cool reefs, identifying and safeguarding thermal refugia, and monitoring the survivors of this event as seed populations for recovery are strategies that emerge directly from the data. The study’s underlying dataset has been made openly available through Zenodo, an act of transparency that should accelerate comparative analyses across the wider Indo-Pacific.

As the ocean continues to warm, the fate of India’s reefs will depend on how quickly science can move from global averages to local realities. This nationwide collaboration has shown that the answers lie not in a single number on a satellite map, but in the interplay of currents, waves, symbionts and history that makes every reef region unique. In the ruins of Palk Bay’s Porites and the survivors of the Andaman Sea, Indian reef science has found both a warning and a roadmap.

Subject of Research: Regional and genus-specific coral bleaching responses across India's reef regions during the fourth global coral bleaching event

Article Title: Regional and genus-specific factors underpin bleaching variation across India’s corals reefs during the fourth global coral bleaching event

Article References: Pinto, W., Deshpande, K., Lobo, A. S., Jamalabad, A., Hussain, A., Paul, A., Dutta, A., Arjunwadkar, C., Patel, F. D., Thareja, H., Nangia, I., Josh, J., Goenka, K., Manikandan, B., Namboothri, N., Kuwalekar, P., Nambiar, S., Jaishankar, S., Mahesh, S., … Arthur, R. (2026). Regional and genus-specific factors underpin bleaching variation across India’s corals reefs during the fourth global coral bleaching event. Coral Reefs. https://doi.org/10.1007/s00338-026-02919-7

Image Credits: AI Generated

DOI: 10.1007/s00338-026-02919-7

Keywords: coral bleaching, fourth global bleaching event, degree heating weeks, Lakshadweep, Andaman Islands, thermal refugia, Acropora, Porites, Palk Bay, thermal stress, Indian Ocean reefs, bleaching susceptibility