Elasmobranchii (sharks and rays) > Squaliformes
(Sleeper and dogfish sharks) > Squalidae
Etymology: Squalus: Genus name from Latin 'squalus' meaning shark (Ref. 6885, 27436).
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 150 - 300 m (Ref. 31367). Deep-water; 41°N - 5°N
Western Pacific: southeastern Japan and East China Sea, including the Republic of Korea, the Philippines, and the Arafura Sea (Ref. 9819).
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 79 - ? cm
Max length : 91.0 cm TL male/unsexed; (Ref. 247)
Found on the outer continental and insular shelves and uppermost slopes, presumably on or near sandy-mud bottom (Ref. 31367, 11230). Ovoviviparous (Ref. 205).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Distinct pairing with embrace (Ref. 205).
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)
IUCN Red List Status (Ref. 125652)
Threat to humans
Fisheries: minor commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 12.4 - 19.6, mean 15.3 °C (based on 39 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00339 (0.00159 - 0.00720), b=3.09 (2.92 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 4.4 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153
): High vulnerability (56 of 100) .
Climate Vulnerability (Ref. 125649
): (0 of 100) .