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Elasmobranchii (sharks and rays) > Carcharhiniformes (Ground sharks) > Triakidae (Houndsharks) > Triakinae
Etymology: Triakis: Greek, triakis = three times (Ref. 45335).

Environment / Climate / Range Ecology

Marine; brackish; demersal; depth range ? - 91 m (Ref. 9253), usually ? - 6 m (Ref. 55312). Subtropical; 45°N - 19°N, 126°W - 105°W (Ref. 55312)

Length at first maturity / Size / Weight / Age

Maturity: L_m 105.0, range 100 - 129 cm
Max length : 198 cm TL male/unsexed; (Ref. 244); 180.0 cm TL (female); common length : 160 cm TL male/unsexed; (Ref. ); max. published weight: 18.4 kg (Ref. 40637); max. reported age: 30 years (Ref. 6145)

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

Eastern Pacific: Oregon, USA to the Gulf of California.

Found in shallow water from the intertidal to deeper waters, most commonly in enclosed muddy bays; including estuaries and lagoons (S. Wilson, pers. comm.). Prefer sandy areas, mud flats, and bottoms strewn with rocks near rocky reefs and kelp beds. Feed mainly on crabs, shrimps, bony fish, fish eggs, clam necks and innkeeper worms among a large variety of food in its diet. Form mixed schools. Ovoviviparous (aplacental), with 4 to 29 young in a litter. Utilized fresh or frozen for human consumption.

Main reference Upload your references | References | Coordinator : Compagno, Leonard J.V. | Collaborators

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 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO.

IUCN Red List Status (Ref. 90363)

Least Concern (LC)

Threat to humans

Harmless

Human uses

Fisheries: commercial; gamefish: yes; aquarium: commercial

FAO(fisheries: species profile; publication : search) | FisheriesWiki | Sea Around Us

More information

Countries
FAO areas
Ecosystems
Occurrences
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Ecology
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Food consumption
Ration

Common names
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Predators
Ecotoxicology
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Eggs
Egg development

Age/Size
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Length-weight
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Morphometrics
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Larvae
Larval dynamics
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Estimates of some properties based on empirical models

Phylogenetic diversity index (Ref. 82805): PD₅₀ = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00238 (-0.15076 - 0.15552), b=3.11 (3.01 - 3.20), based on LWR estimates for species & family-BS (Ref. 93245).

Trophic Level (Ref. 69278): 3.7 ±0.5 se; Based on diet studies.

Resilience (Ref. 69278): Very Low, minimum population doubling time more than 14 years (K=0.07-0.09; tm=11-21; tmax=30; Fec=4-12).

Vulnerability (Ref. 59153): Very high vulnerability (80 of 100) .

Price category (Ref. 80766): High.

Triakis semifasciata Girard, 1855