Bigeye Trevally

Photo: Raphael Forns · CC BY-NC

Dense schools of bigeye trevally swirl around the Saratoga's superstructure in tight, synchronized formations that confuse predators attempting to single out individuals — a schooling strategy that is itself a form of collective defense. They feed on small fish and invertebrates both day and night, and their spiraling schools create some of the most visually dramatic spectacles available to divers anywhere in the world.