guppy
noun
°A tiny freshwater fish, Poecilia reticulata, popular in home aquariums, that usually has a plain body and black or dark blue tail for the females and a more colorful tail for the males.
°By extension, any tiny fish.
"Throw that one back; it’s just a guppy!"
synonyms: millionfish, acanthocephalus guppii, acanthocephalus reticulatus, girardinus guppii more» , girardinus petersi, girardinus poeciloides, girardinus reticulatus, haridichthys reticulatus, heterandria guppyi, lebistes poecilioides, lebistes reticulatus, poecilia poeciloides, poecilia reticulata, poecilioides reticulatus