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Teleostei (teleosts) > Ophidiiformes (Cusk eels) > Bythitidae (Livebearing brotulas)
Etymology: Bidenichthys: Latin, bi = two + Greek, dens, dentis = teeth + Greek, ichthys = fish (Ref. 45335).
Eponymy: C Leo Biden of Cape Town was described as a ‘knowledgeable angler’, and a person “…to whom the South African Museum is indebted for many specimens and much information.” He wrote: Sea-Angling Fishes of the Cape (1948). (Ref. 128868), visit book page.

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

Marine; demersal; depth range 30 - 178 m (Ref. 34024). Temperate

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Southwest Pacific: off northern New Zealand.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 16.0 cm TL male/unsexed; (Ref. 9003)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 75; Anal spines: 0; Anal soft rays: 45. Small specimens greyish brown to blackish with a pale yellowish tinge; larger specimens orange or yellow with mottled brown markings.

A rare species found in rocky areas (Ref. 34024). Reported to occur in rock pools (Ref. 9003). Possibly nocturnal (Ref. 9003).

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

Main reference Upload your references | References | Coordinator | Collaborators

Nielsen, J.G., D.M. Cohen, D.F. Markle and C.R. Robins, 1999. Ophidiiform fishes of the world (Order Ophidiiformes). An annotated and illustrated catalogue of pearlfishes, cusk-eels, brotulas and other ophidiiform fishes known to date. FAO Fish. Synop. 125(18):178p. Rome: FAO. (Ref. 34024)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Least Concern (LC) ; Date assessed: 15 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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Trophic ecology
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Estimates based on models

Preferred temperature (Ref. 123201): 13.3 - 16.8, mean 15.1 °C (based on 19 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00447 (0.00172 - 0.01163), b=3.10 (2.87 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

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

Resilience (Ref. 120179): Low, minimum population doubling time 4.5 - 14 years (Assuming Fec < 100).

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

Bidenichthys consobrinus (Hutton, 1876)