Bigeye scad are tropical fish found in warm waters around the globe. The fish group together in huge schools for protection and spend most of their life close to the shore in coral reefs. When they are near to the shore, swimmers can get up close to the fish, and even swim right through the massive schools. The fish pose no danger to swimmers, but they do regard any intruders with a note of suspicion and will swim away as quickly as possible. Credit: YouTube/kawika singson