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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.
Entorno: milieu / zona climática / rango de profundidad / gama de distribución
Ecología
marino demersal; rango de profundidad 30 - 178 m (Ref. 34024). Temperate
Southwest Pacific: off northern New Zealand.
Tamaño / Peso / Edad
Madurez: Lm ?  range ? - ? cm
Max length : 16.0 cm TL macho / no sexado; (Ref. 9003)
Espinas dorsales (total) : 0; Radios blandos dorsales (total) : 75; Espinas anales: 0; Radios blandos anales: 45. Small specimens greyish brown to blackish with a pale yellowish tinge; larger specimens orange or yellow with mottled brown markings.
Body shape (shape guide): elongated.
A rare species found in rocky areas (Ref. 34024). Reported to occur in rock pools (Ref. 9003). Possibly nocturnal (Ref. 9003).
Ciclo vital y comportamiento de apareamiento
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
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)
Situación en la Lista Roja de la UICN (Ref. 130435: Version 2025-2 (Global))
Amenaza para el ser humano
Harmless
Usos humanos
Pesquerías: sin interés
Herramientas
Informes especiales
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Fuentes de Internet
Estimaciones basadas en modelos
Temperatura preferida (Referencia
123201): 13.3 - 16.8, mean 15.1 °C (based on 19 cells).
Índice de diversidad filogenética (Referencia
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00479 (0.00192 - 0.01191), b=3.03 (2.81 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nivel trófico (Referencia
69278): 3.4 ±0.5 se; based on size and trophs of closest relatives
Resiliencia (Referencia
120179): Bajo, población duplicada en un tiempo mínimo de 4.5-14 años (Assuming Fec < 100).
Vulnerabilidad pesquera (Ref.
59153): Low vulnerability (10 of 100).
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