Parasite-laden fish choose to use sharks as back scratchers – but bite-sized fish are less likely to take the risk of being eaten!
Article URL: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0275458 Credit: Christopher D. H. Thompson, CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/) Article URL: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0275458 Article Title: Sharks are the preferred ...
