Triakis semifasciata  Girard, 1855

Leopard shark
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Triakis semifasciata
Picture by Moreau, J.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

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 0 - 156 m (Ref. 96339), usually ? - 6 m (Ref. 55312).   Subtropical; 45°N - 19°N, 126°W - 105°W (Ref. 55312)

Length at first maturity / Size / Weight / Age

Maturity: Lm 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 | Point map | Introductions | Faunafri

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

Biology     Glossary (e.g. epibenthic)

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.

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Females produce 6-24 young, which are 20-23 cm long at birth (Ref. 43439). Ovoviviparous, embryos feed solely on yolk (Ref. 50449).

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. (Ref. 244)

IUCN Red List Status (Ref. 96402)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial; gamefish: yes; aquarium: commercial
FAO(fisheries: species profile; publication : search) | FisheriesWiki | Sea Around Us

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5312   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00224 (0.00123 - 0.00406), b=3.14 (2.97 - 3.31), based on LWR estimates for species & Subfamily-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.7   ±0.2 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.