genus Atherinopsis

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Noun1.genus Atherinopsis - a genus of Atherinidaegenus Atherinopsis - a genus of Atherinidae    
fish genus - any of various genus of fish
Atherinidae, family Atherinidae - small spiny-finned fishes of both salt and fresh water
Atherinopsis californiensis, jacksmelt - a relatively large silversides of the Pacific coast of North America (known to reach 18 inches in length)