cy·prin·o·dont 
(sĭ-prĭnə-dŏnt′, -prīnə-)
(sĭ-prĭnə-dŏnt′, -prīnə-)n.
Any of various small fishes of the family Cyprinodontidae, which includes the pupfishes and formerly included the killifishes and topminnows.
[Latin cyprīnus, carp (from Greek kuprīnos; see CYPRINID) + -ODONT.]
cy·prino·dont′ adj.