Hemigrammus unilineatus (Gill, 1858)
Featherfin tetra
Featherfin sardine
Hemigrammus unilineatus
photo by Landines, M.

Family:  Characidae (Characins; tetras), subfamily: Stethaprioninae
Max. size:  5.3 cm TL (male/unsexed)
Environment:  benthopelagic; freshwater; pH range: 6 - 7.5; dH range: 20
Distribution:  Central and South America: River basins of Trinidad, coastal river basins of Venezuela, rivers of Guyana, Suriname, French Guiana; Amazon and Guaporé River basins.
Diagnosis:   
Biology:  Usually found in ponds, ditches, slow flowing streams, both clear and turbid, in both open and shaded areas. A voracious species which feeds on small crustaceans, insects and mollusks (Ref. 12225). Gregarious and non-aggressive, it is reputedly easy to rear and to reproduce in the aquarium (Ref. 27188). Maximum length questionable (Ref. 38376).
IUCN Red List Status: Least Concern (LC); Date assessed: 04 March 2021 Ref. (130435)
Threat to humans:  harmless
Country info:  Found in the northern Oropouche River, southwest of Matura, east Trinidad (Ref. 27226). Abundant in northern Trinidad south of the Northern Range (Ref. 27226). Also Ref. 13676, 38376.


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