RICHARD BROOKS / SCIENCE PHOTO LIBRARY RICHARD BROOKS / SCIENCE PHOTO LIBRARY
Grey reef sharks (Carcharhinus amblyrhynchos) menacing a huge school of bigeye trevally (Caranx sexfasciatus). The trevally mas together during the day for protection against predators, whose movements scatter the school. At night the school splits up and the fish hunt alone over reefs. Filmed in Palau.
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