Schooling Jacks

Lady Elliot Island , the southernmost coral cay of the Great Barrier Reef , is teeming with life underwater. Bigeye trevally, also called jacks, are frequently seen schooling. During the day they are stationary or slow-moving around the reef complexes, but at night, these aggregations dissolve, as the fish become more active, preparing for a night of hunting for their prey.

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