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''Cnesterodon carnegiei'', commonly known as Carnegie's toothcarp, is a species of poeciliid native to southeastern Brazil and Uruguay.Lucinda, P.H.F., 2003. Poeciliidae (Livebearers). p. 555-581. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brazil.


Etymology

The species name was given in honor of philanthropist Andrew Carnegie (1835–1919), whose Carnegie Museum sponsored
Carl Eigenmann Carl Henry Eigenmann (March 9, 1863 – April 24, 1927) was a German-American ichthyologist of the late nineteenth and early twentieth centuries, who, along with his wife Rosa Smith Eigenmann, and his zoology students is credited with identifyin ...
's 1907 expedition to central South America, during which the type specimen was collected.


Description

This small species has a slender body and a pointed head. The base color is a grayish yellow, the belly is white, and the middle of the flanks show three to five black comma-shaped streaks. All the fins are colorless. ''Cnesterodon carnegiei'' attains a length of only in males and about in females.


Reproduction

The males possess an angled, anterior placed gonopodium. Typical for the female is her bulging body that increases in size as the gestation progresses.


Location

''Cnesterodon carnegiei'' is found in southeastern Brazil and Uruguay. Nothing about the biotopes is known.


Aquarium care

Although this species is not overly sensitive, it can be an aquarium fish that feels at home even in the smallest aquaria. The aquaria should be well planted, the water moderately agitated and a temperature of about . which seems to suit these fish just fine. Regular partial water changes round out their optimal care.


Diet

Diet is not a problem as long as the aquarist realizes that these fish can only manage to swallow the smallest morsels. It is advisable, therefore, to feed them only live foods such as Cyclops, Artemia and sieved pond food. As a supplement, they can be given the dry, almost dust like food usually fed to young fish. Keeping them in algae-overgrown tanks, too, has been very successful.


Raising young

Such algae covered aquarium tanks, are not always a pleasant sight, so the young fish should be raised in a separate algae covered tank and not in the parent's aquarium itself. After a 24 days gestation period, from five to ten, and rarely up to 15, young are born, each measuring . Sexual maturity occurs after the third or fourth month.


References

{{Taxonbar, from=Q3759321 Poeciliidae Fish of South America Taxa named by John Diederich Haseman Fish described in 1911