Elasmobranchii (sharks and rays) > Squaliformes
(Bramble, sleeper and dogfish sharks) > Etmopteridae
Etymology: Trigonognathus: Greek, trigono = a triangle + Greek, gnathos = jaw (Ref. 45335). Refers to the triangular shape of the jaws (Ref. 31259); kabeyai: Named after Mr. Hiromichi Kabeya who collected the type specimens (Ref. 31259).
Environment / Climate / Range
Marine; bathydemersal; depth range 330 - 360 m (Ref. 31259). Deep-water
Length at first maturity / Size / Weight / Age
Maturity: Lm 52.0  range ? - ? cm
Max length : 47.0 cm TL male/unsexed; (Ref. 55729); 53.9 cm TL (female); max. published weight: 425.60 g (Ref. 55729); max. published weight: 425.60 g
Northwest Pacific: Wakayama and Tokushima, Japan (Ref. 31259). Reported from the Hawaiian Islands (Ref. 58302).
Specimens collected between 330 and 360 m (Ref. 31259). Ovoviviparous (Ref. 205).
Mochizuki, K. and F. Ohe, 1990. Trigonognathus kabeyai, a new genus and species of the squalid sharks from Japan. Jap. J. Ichthyol. 36(4):385-390. (Ref. 31259)
IUCN Red List Status (Ref. 90363)
CITES (Ref. 94142)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
CollaboratorsPicturesStamps, CoinsSoundsCiguateraSpeedSwim. typeGill areaOtolithsBrainsVision
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00339 (0.00157 - 0.00730), b=3.12 (2.92 - 3.32), based on LWR estimates for this Subfamily-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 4.5 ±0.8 se; Based on diet studies.
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Vulnerability (Ref. 59153
): Moderate vulnerability (43 of 100) .