Agosia chrysogaster
Longfin Dace
NS
G4
Taxonomic Hierarchy
Actinopterygii (Ray-finned Fishes)
Cypriniformes (Carps and Minnows)
Cyprinidae (Carps and Minnows)
Agosia
Agosia chrysogaster (Longfin Dace)
Description
This species account was compiled from
FishBase (Froese, R. and D. Pauly. Editors. 2025. FishBase. World Wide Web electronic publication. www.fishbase.org, version 04/2025.)
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Characters
Body shape: fusiform / normal. Agosia chrysogaster can be distinguished by its elongated lower lobe on anal fin in large female, 70-95 small lateral scales, small barbell at corner of mouth, long coiled intestine, black peritoneum, rounded snout, slightly subterminal mouth, dorsal fin origin above or slightly in front of pelvic fin origin, 7 anal rays, pharyngeal teeth 0,4-4.0. Color consists of dark gray above, dusky black band along silver side enlarged into black spot at caudal fin base, often gold flecks on side. Large male is light yellow below, with yellow paired fin bases, large dorsal fin (Ref. 86798).
Distribution
North America: lower Colorado River drainage (primarily Gila and Bill William River systems) in New Mexico and Arizona, USA and south through southern Arizona and Pacific drainages of Mexico.
Habitat Associations
Freshwater. demersal. Found in: streams.
Biology
Inhabits shallow sandy and rocky runs, flowing pools of creeks and small to medium rivers. Often occurs near cover (Ref. 86798).
Max length: 10.0 cm TL.
IUCN Red List Status: Least Concern (LC), assessed 2018-10-16. Resilience: High (Preliminary K or Fecundity.).
References
Page, L.M. and B.M. Burr (2011) A field guide to freshwater fishes of North America north of Mexico. Boston : Houghton Mifflin Harcourt, 663p.
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