rivulus

English Thesaurus

1. found in small streams of tropical America; often kept in aquariums; usually hermaphroditic (noun.animal)

hypernym	:	killifish,
definition	:	small mostly marine warm-water carp-like schooling fishes; used as bait or aquarium fishes or in mosquito control (noun.animal)

member meronym	:	genus rivulus,
definition	:	killifish (noun.animal)