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Teleostei (teleosts) > Ophidiiformes (Cusk eels) > Bythitidae (Livebearing brotulas)
Etymology: More on author: Nielsen.

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

Marine; bathypelagic; depth range 1075 - 4280 m (Ref. 128809). Deep-water

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Indo-West Pacific: off Madagascar, off South China Sea and off Vanuatu; including Australia.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 15.5 cm SL male/unsexed; (Ref. 128809); 14.5 cm SL (female)

Short description Identification keys | Morphology | Morphometrics

This species is distinguished from its congeners by the following set of characters: 11-15 long gill rakers long on anterior gill arch; pectoral-fin rays 13-17, preanal length 49.5-60 % of SL, anterior anal fin ray is below dorsal fin ray nos. 14-19; dorsal fin orgin above vertebra nos. 18-22; precaudal vertebrae 26-30; absence of black pigmentation laterally in roof of mouth (Ref. 105129, 128809).

A rare species (Ref.34024). All six specimens collected were caught in bottom fishing gear. Presence of a penis and spermatozoans arranged in spermatophores (Nielsen 1974, Ref. 40903:182) indicate interior fertilization. The eggs were up to 0.7 mm in diameter, but embryos were not observed (Ref. 105129).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Nielsen, J.G., 2015. Revision of the aphyonid genus Aphyonus (Teleostei: Ophidiiformes) with a new genus and two new species. Zootaxa 4039(2):323-344. (Ref. 105129)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 16 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: of no interest

FAO - Publication: search | FishSource |

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Estimates based on models

Preferred temperature (Ref. 123201): 2.8 - 5.5, mean 4.1 °C (based on 109 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.4 ±0.5 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

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

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