Corals share a close bond with the fish dwelling among them and the algae living within them. According to a new study, that relationship could be even stronger than previously known, with fish aiding coral tissue repair and damage recovery, particularly in higher-stress environments. The study, published on July 8 in Biology Letters, concluded that the yellowtail dascyllus (Dascyllus flavicaudus), a type of damselfish, helps heal injuries on Pocillopora spp., a genus of stony coral largely found in the Indo-Pacific Ocean. “Surprisingly, we found that the bigger the wound, the faster the recovery,” said Hayden Vega, lead author of the study and a Ph.D. student at the University of California, Berkeley, in the U.S. Previous research has shown that coral-dwelling fish aid in the cleaning of coral wounds and help corals tolerate warming oceans. But the new evidence of wound healing via tissue repair suggests that interactions between these organisms could be more beneficial than previously thought, especially under stressful conditions. Yellowtail dascyllus (Dascyllus flavicaudus) damselfish swim around coral in French Polynesia. Image © mndiminuco via iNaturalist (CC BY-NC 4.0). “These positive interactions between species under stress end up creating a network of resilience in ecosystems,” Vega told Mongabay during a Zoom call. Vega thinks this sort of supportive relationship could extend beyond yellowtail dascyllus and coral. He hopes the findings will prompt researchers to look more deeply at mutualistic benefits shared between other marine species, particularly in warming oceans, with research results then applied to conservation management plans. This is…This article was originally published on Mongabay

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