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Triakis semifasciata Girard, 1855
Life   Vertebrata   Fish   Triakidae   Triakis

Triakis semifasciata
© Copyright Photographer/SFTEP, 2002 · 0
Triakis semifasciata

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Triakis semifasciata Copyright Michel Lamboeuf · 0
Triakis semifasciata

Main identification features
  • back: dark saddles
  • flanks and fins: dark spots
Leopard houndshark

Elongate, robust humped body; snout short, bluntly rounded; mouth convex; teeth with a single large central and accessory points; 5 gill slits, last 2 over pectoral fin base; pectorals broadly triangular in adults; 2 large dorsal fins, second slightly smaller than first; first dorsal fin with oblique rear edge, center midway between pelvic than pectoral; anal fin smaller than and with origin under middle of second dorsal; eyes horizontal ovals, with ventral nictitating membranes; tail strongly asymmetrical, lower lobe without point.

Grey to grey-bronze above, white belly; large black, white centered saddles on back, large black spots scattered over lower body and fins.

Size: 210 cm.

Habitat: common in shallow tidal areas.

Depth: 0-156 m.

Temperate; Oregon to the lower 3/4 of the Gulf of California and central Mexico.

Abundance: Common.
Cites: Not listed.
Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California); Northern Subtropical (Cortez Province + Sinaloan Gap); Northern Tropical (Mexican Province to Nicaragua + Revillagigedos).
Depth Range Max: 156 m.
Depth Range Min: 0 m.
Diet: mobile benthic crustacea (shrimps/crabs); bony fishes; mobile benthic worms; mobile benthic gastropods/bivalves.
Eastern Pacific Range: Northern limit=33; Southern limit=19; Western limit=-118; Eastern limit=-104; Latitudinal range=14; Longitudinal range=14.
Egg Type: Live birth; No pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: TEP non-endemic; East Pacific endemic; All species.
Habitat: Estuary; Mud; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Soft bottom only; Sand & gravel.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Conservation dependent; Listed.
Length Max: 210 cm.
Regional Endemism: Continent only; Continent; Temperate Eastern Pacific, primarily; Tropical Eastern Pacific (TEP) non-endemic; California province, primarily; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;

Scientific source:

Links to other sites

  • Bellido-Millán, J.M. and Villavicencio-Garayzar, C.J., 2002., Pesqueria artesanal de tiburon en la region central del Golfo de California. En: Lozano-Vilano, M. L. (Ed.). Libro Jubilar en Honor al Dr. Salvador Contreras Balderas., Universidad Autonoma de Nuevo León:143-152.
  • Compagno, L.J.V., 1999., Checklist of living elasmobranchs. In Hamlett W.C. (ed.) Sharks, skates, and rays: the biology of elasmobranch fishes., The John Hopkins University Press:471-498.
  • Compagno, L.J.V., 1984., Sharks of the World. An annotated and illustrated catalogue of shark species known to date. Part 2. Carcharhiniformes. FAO Species Catalogue., FAO Fish. Synop. No 125, 4(2):251-655.
  • De la Cruz , J. , Galvan , F. , Abitia , L. A. , Rodriguez , J. and Gutierrez, F. J., 1994., Lista sistematica de los peces marinos de Bahia Magdalena, Baja California Sur (Mexico). Systematic List of marine fishes from Bahia Magdalena, Baja California Sur (Mexico)., Ciencias Marinas, 20:17-31.
  • Eschmeyer , W. N. , Herald , E. S. and Hamman, H., 1983., A field guide to Pacific coast fishes of North America from the Gulf of Alaska to Baja California. Peterson Field Guide Ser. 28., Houghton Mifflin:336pp.
  • Findley, L.T., Hendrickx, M.E., Brusca, R.C., van der Heiden, A.M., Hastings, P.A., Torre, J., 2003., Diversidad de la Macrofauna Marina del Golfo de California, Mexico., CD-ROM versión 1.0. Projecto de la Macrofauna del Golfo .  Derechos reservados de los autores y Conservación Internacional.
  • Fischer , W. , Krup , F. , Schneider , W. , Sommer , C. , Carpenter , K. E. and Niem, V. H., 1995., Guia FAO para la Identificacion de Especies de para los fines de la Pesca. Pacifico Centro-Oriental. Volumen II. Vertebrados - Parte 1., FAO2:647-1200.
  • Galván-Magaña, F., Gutiérrez-Sánchez, F., Abitia-Cárdenas, L.A., Rodríguez-Romero, J., 2000., The distribution and affinities of the shore fishes of the Baja California Sur lagoons. In Aquatic Ecosystems of Mexico: Status and Scope. Eds. M. Manuwar, S.G. Lawrence, I.F. Manuwar & D.F. Malley. Ecovision World Monograph Series., Backhuys Publishers:383-398.
  • Girard, C., 1855., Characteristics of some cartilaginous fishes of the Pacific coast of North America., Proc. Acad. Nat. Sci. Phila., 7:196-197.
  • Jordan , D.S. and Gilbert, C.H., 1880., Notes on a collection of fishes from San Diego, California., Proc. U.S. Nat. Mus., 3:23-34.
  • Love, M.S., Mecklenburg, C.W., Mecklenburg, T.A., Thorsteinson, L.K., 2005., es of the West Coast and Alaska: a checklist of North Pacific and Artic Ocena species from Baja California to the Alaska-Yukon border., U.S. Department of the Interior, U.S. Geological Survey, Biological Resources Division, 288pp.
  • Madrid Vera , J. , Ruíz Luna , A. and Rosado Bravo, I., 1998., Peces de la plataforma continental de Michoacán y sus relaciones regionales en el Pacífico mexicano., Revista de Biologia Tropical, 42(2):267-276.
  • Osburn , R. C. and Nichols, J. T., 1916., Shore Fishes Collected by the 'Albatross' Expedition in Lower California with Descriptions of New Species., Bull. Amer. Mus. Nat. Hist., 35:139-181.
  • Pondella II, D.J., Gintert, B.E., Cobb, J.R., Allen, L.G., 2005., Biogeography of the nearshore rocky-reef fishes at the southern and Baja California islands., Journal of Biogeography, 32:187-201.
  • Van der Heiden , A. M. and Findley, L. T., 1988., Lista de los peces marinos del sur de Sinaloa, México., Anales del Centro de Ciencias del Mar y Limnologia de la Universidad Autonoma Nacional de Mexico, 15:209-224.


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Number of matches : 8
Query: SELECT * FROM img WHERE ready=1 and taxon like "Triakis semifasciata%" and (lifeform != "specimen_tag" OR lifeform != "Animal") ORDER BY taxon

Click on the thumbnail to see an enlargement

Triakis semifasciata
UCMP specimen card
ID: 2222 0704 0051 0028 [detail]
© University of California Museum of Paleontology

Triakis semifasciata
UCMP specimen card
ID: 2222 0704 0051 0029 [detail]
© University of California Museum of Paleontology

Triakis semifasciata
UCMP specimen card
ID: 2222 0804 0009 0038 [detail]
© University of California Museum of Paleontology

Triakis semifasciata
UCMP specimen card
ID: 2222 0804 0009 0039 [detail]
© University of California Museum of Paleontology

Triakis semifasciata
Triakis semifasciata
Leopard Shark
ID: 0000 0000 0305 0023 [detail]
© 2005 Joseph Dougherty/

Triakis semifasciata
Triakis semifasciata
Leopard Shark
ID: 0000 0000 0305 0836 [detail]
© 2005 John White

Triakis semifasciata
Triakis semifasciata
Leopard Shark
ID: 0000 0000 0305 0837 [detail]
© 2005 John White

Triakis semifasciata
Triakis semifasciata
Leopard Shark
ID: 0000 0000 1008 0903 [detail]
© 2008 Tammy Ward

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Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Triakis semifasciata Girard , 1855

Leopard shark Add your observation in Fish Watcher
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Triakis semifasciata   AquaMaps   Data sources: GBIF OBIS
Upload your photos  and  videos
Pictures | Videos |     Stamps, Coins Misc. | Google image Image of Triakis semifasciata (Leopard shark) 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 ) .  More on author: Girard .

Environment: milieu / climate zone / depth range / distribution 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 )

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

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

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 )

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. 120744 )

  Least Concern (LC)  ; Date assessed: 18 December 2014

CITES (Ref. 115941 )

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans


Human uses

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

More information

FAO areas
Food items
Food consumption
Common names
Spawning aggregation
Egg development
Larval dynamics
Aquaculture profile
Allele frequencies
Mass conversion
Stamps, Coins Misc.
Swim. type
Gill area


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Summary page | Point data | Common names | Photos

Internet sources

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes ( gen. , sp. ) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank( genome , nucleotide ) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | Public aquariums | PubMed | Reef Life Survey | Tree of Life | Wikipedia( Go , Search ) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Preferred temperature (Ref. 115969 ): 12.8 - 24, mean 20.4 (based on 131 cells). Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 0.5312   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.00240 (0.00131 - 0.00439), b=3.11 (2.95 - 3.27), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (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 .

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