Elasmobranchii (sharks and rays) > Carcharhiniformes
(Ground sharks) > Triakidae
(Houndsharks) > Triakinae
Etymology: Triakis: Greek, triakis = three times (Ref. 45335).
Environment / Climate / Range
Marine; demersal. Tropical; 0°S - 30°S
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 180 cm TL male/unsexed; (Ref. 244)
Eastern Pacific: Galapagos Islands and from Peru to northern Chile. Mexican records of this species are erroneous.
Found on the continental shelf, mostly inshore. Possibly to 240 cm. Probably feeds on benthic invertebrates (Ref. 28023). Ovoviviparous (Ref. 50449), with about 14 young to a litter. Size of full-term fetuses 30 to 40 cm. Utilized for human consumption.
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)
Threat to humans
Fisheries: minor commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
CollaboratorsPicturesStamps, CoinsSoundsCiguateraSpeedSwim. typeGill areaOtolithsBrainsVision
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00251 (0.00122 - 0.00514), b=3.16 (2.98 - 3.34), based on LWR estimates for this Subfamily-BS (Ref. 93245
Trophic Level (Ref. 69278
): 3.5 ±0.37 se; Based on food items.
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (Fec=14).
Vulnerability (Ref. 59153
): Very high vulnerability (78 of 100) .