Classification / Names
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Teleostei (teleosts) >
Characiformes (Characins) >
Crenuchidae (South American darters) > Characidiinae
Etymology: Geryichthys: Because of Dr. Jacques Gery, noted authority on Characoids (Ref. 45335).
Eponymy: Dr Jacques Géry (1917– 2007) was a French physician and ichthyologist. [...] Dr Günther Hans Wenzel Sterba (1922–2021) was a zoologist, ichthyologist and aquarist in the former East Germany. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
South America: upper Amazon River basin at the region of Iquitos and Ucayali drainage in Peru.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.0 cm SL male/unsexed; (Ref. 37059)
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Buckup, P.A., 2003. Crenuchidae (South American darters). p. 87-95. 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, Brasil. (Ref. 37059)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
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