Astroblepus Onzagaensis (Astroblepus onzagaensis) is a ray-finned fish of the family Astroblepidae. It inhabits freshwater waters in benthic environments. This species can reach a maximum total length of 16.3 cm. With a trophic level of 3.3, it is a low-level carnivore, feeding on invertebrates and small organisms.
This species is distinguished by the following characters: adipose fin with well-developed membrane, no spine; maxillary wattle reaching beyond the oral disk; first pectoral radius shorter than head longitude; soft branching radii 7; first radius of pelvic fin does not reach the anus; premaxillary has 1-5 bicuspid and 4-9 conical teeth in external row; first simple radii of caudal fin have a short extension; fifth ceratobrachial bone with 9 teeth in the anterior region; free vertebrae 25 .Cross section: oval.
Behavioural data for Astroblepus Onzagaensis is currently being reviewed.
Freshwater; demersal. Tropical South America: Colombia.
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