Sharks Driven From Coral Reefs?

The oceans store much of the heat, resulting from the 'greenhouse gas' emissions produced by current human activities. Oceans also store much of the carbon dioxide, increasing the acidity of their waters. These warming waters, have a lower oxygen content. This, as well as the increasing temperatures per se, challenge survival of many marine species. Most ocean animals are poikilothermic ('cold blooded'), taking on the temperature of their surroundings. Temperature change forces some to relocate. This was illustrated by tagging a total of more than 120 Grey reef sharks. From 2012-2020, the movements of these top predators on coral reefs in the Indian Ocean's Chagos archipelago, were studied. Ocean heating, caused these sharks to desert their reefs, often for extended periods. They consequently spent much less time there. This was especially evident in the especially hot El Nino event of 2015-16. There's concern that such impacts on behaviour, damage both the sharks and the fragile reef ecosystems (https://www.theguardian.com/environment/article/2024/sep/09/sharks-deserting-coral-reefs-climate-crisis-heating-oceans-study). This study clearly illustrate that the excess heat produced by anthropogenic climate change, will have wide repercussions on marine ecosystems. This will impact on fisheries and other ecosystem services relied upon by humanity.