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Teleostei (teleosts) > Siluriformes (Catfishes) > Chacidae (Squarehead or angler catfish) > Stevardiinae
Etymology: Cyanogaster: Cyano, latinized from the Greek word kúanous (κυανος), meaning blue, and gaster, from the Greek gastêr (γαστηρ), meaning stomach, in referring to the conspicuous iridescent blue colour in the abdominal region .; noctivaga: Name from Latin noun 'nox' for night and the verb 'vagare' meaning to walk about, when combined as 'noctivaga' or the night wanderer, referring to the presumed nocturnal habits of the species, which was collected exclusively at night; an adjective..

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic; depth range ? - 2 m (Ref. 93233). Tropical

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South America: Brazil and Colombia.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 1.7 cm SL male/unsexed; (Ref. 93233)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 8-9; Anal soft rays: 19 - 22. This species is distinguished by the following characters: D ii + 8; pelvic-fin rays i + 5; teeth in the inner series of the premaxilla 4; differs from all species of the Stevardiinae by having a single conical tooth in the outer premaxillary series (vs. absent); lacks a pheromone pump usually associated with modified scales on the caudal-fin base; eye large; a line of black chromatophores along the bases of anal and caudal fins; body transparent with abdominal region iridescent blue in life (Ref. 93233).

Specimens were caught with a seine pulled at approximately 1.5 m depth. The type locality is a beach on a rocky poorly vegetated plateau, where the water was dark black with slow current. Individuals were collected at night, approximately between 20:00 and 24:00, during the dry season (October). Stomach contents of cleared and stained specimens were mainly remnants of insect larvae (Ref. 93233).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Mattox, G.M.T., R. Britz, M. Toledo-Piza and M.M.F. Marinho, 2013. Cyanogaster noctivaga, a remarkable new genus and species of miniature fish from the Rio Negro, Amazon basin (Ostariophysi: Characidae). Ichthyol. Explor. Freshwat. 23(4):297-318. (Ref. 93233)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 04 March 2021

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Phylogenetic diversity index (Ref. 82804): PD₅₀ = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].

Trophic level (Ref. 69278): 3.0 ±0.4 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

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Cyanogaster noctivaga Mattox, Britz, Toledo-Piza & Marinho, 2013