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n. pl. pupfish or pup·fish·es
Any of various small deep-bodied fishes of the family Cyprinidontidae, chiefly found in isolated habitats such as desert springs and streams of Mexico and the southwest United States.


n, pl -fish or -fishes
(Animals) any of various small killifishes of the genus Cyprinodon, found mainly in brackish or fresh water in southwestern US and northern Mexico, and in coastal areas around the Caribbean



n., pl. (esp. collectively) -fish, (esp. for kinds or species) -fish•es.
any of several tiny, stout killifishes of the genus Cyprinodon, inhabiting marshy waters in arid areas of W North America.
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Absence of temperature-dependent sex determination in northern populations of two cyprinodontid fishes.
In this paper, we present the first report of karyotypes in the cyprinodontid genera Cualac and Floridichthys, members of a monophyletic group of six genera referred to as the Cyprinodontina (Costa, 1997; =Cyprinodontini of Parenti, 1981).
Predator avoidance and school size in a cyprinodontid fish, the banded killifish (Fundulus diaphanous Lesueur).
australis in Venezuela and the cyprinodontid fish Anablepsoides hartii represents a new second intermediate host for this digenean, and the first intermediate host of this species is not known from Venezuela.
Status of the cyprinodontid fish genus Rivulus in Costa Rica, with descriptions of new endemic species.
Cleaning behavior in the cyprinodontid fishes: Fundulus majalis, Cyprinodon variegatus and Lucania parea.
Miller RR, Echelle AA (1975) Cyprinodon tularosa, a new cyprinodontid fish from Tularosa Basin, New Mexico, Southwest.
In Lake Titicaca, the interesting endemic cyprinodontid fish of the genus Orestias are threatened as a result of the introduction of several salmonid and cyprinid fish.
Feeding behavior and terrestrial locomotion in the cyprinodontid fish, Rivulus hartii (Boulenger).
Similar variation in presence-absence of territoriality occurs in the cyprinodontid genus Aphanius, the Old World ecological equivalent of Cyprinodon.
Hemoglobin (hgb) patterns of five Cyprinodontid species occurring in New Jersey were studied.