killifish
Concise Oxford English Dictionary © 2008 Oxford University Press:
killifish /ˈkɪlɪfɪʃ/
▶noun (pl. same or killifishes) a small, typically brightly coloured fish of fresh or brackish water, mainly native to America. [Families Cyprinodontidae and Poeciliidae : many species.]
'killifish' also found in these Oxford entries:

