Atheriniforms are gregarious fishes that form schools of various sizes. Some marine silversides aggregate into enormous schools—numbering in the thousands—which cruise just below the surface, continually feeding on plankton. For instance, Atherinomorus capricornensis has been observed forming schools more than 328 ft (100 m) long and 65.6 ft (20 m) wide. At night silversides are attracted to bright lights and are caught easily by fishermen for use as bait. Some of the most interesting types of behavior found in atherini-forms, however, relate to reproduction.
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