| Common names: shark (English), dormilón (Espanol), tiburón (Espanol) |
Heterodontus quoyi (Fréminville, 1840)
Galapagos bullhead shark
A slender-bodied shark with a large squarish pig-lke snout; low bony ridge above each eye ends gradually at rear; nostrils without barbels, with grooves around nostrils and connected to the mouth; anterior nasal flaps elongate posteriorly; small mouth; front teeth with 3 similar sized points, enlarged molariform teeth posteriorly; both dorsal fins with a sharp spine; origin of first dorsal fin behind pectoral fin base, over inner fin margin.
Grey or light brown with large (> ½ eye diameter) blackish leopard- like spotting; no pale bar between eyes; dark spots or blotches under eye; a series of diffuse dark grey bars may be present across back and sides.
Size: reaches 107 cm.
Habitat: often seen resting on sand adjacent to rocky reefs.
Depth: 3-40 m.
Galapagos Islands and Ecuador to Peru.
Global Endemism: All species, East Pacific endemic, TEP non-endemic
Regional Endemism: All species, Tropical Eastern Pacific (TEP) non-endemic, Temperate Eastern Pacific, primarily, Peruvian province, primarily, Continent + Island (s), Continent, Island (s)
Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo), South Temperate (Peruvian Province )
Catalog Number: USNM 77691
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): R. Coker
Locality: Lobos De Tierra, Lobos de Tierra Island, Peru, Pacific
- Type: Evermann, B. W. & Radcliffe, L. 1917. Bulletin of the United States National Museum. No. 95: 2, fig 1.; pl. 1.
Inshore/Offshore: Inshore, Inshore Only
Water Column Position: Bottom, Bottom only
Habitat: Reef (rock &/or coral), Rocks, Reef and soft bottom, Reef associated (reef + edges-water column & soft bottom), Soft bottom (mud, sand,gravel, beach, estuary & mangrove), Sand & gravel
FishBase Habitat: Reef Associated
Habitat and Ecology
From 3 to 40 meters.
Diet: mobile benthic crustacea (shrimps/crabs), mobile benthic gastropods/bivalves, sea-stars/cucumbers/urchins, bony fishes
Life History and Behavior
CITES: Not listed
IUCN Red List Assessment
Red List Category
Red List Criteria
Commonly observed by divers (Compagno 2001) and may have ecotourism value.
Relevance to Humans and Ecosystems
Galapagos bullhead shark
The Galapagos bullhead shark, Heterodontus quoyi, is a bullhead shark of the family Heterodontidae. It is found in the tropical eastern Pacific Ocean between latitudes 0° to 10° S, at depths between 3 and 40 m. It can reach a length of 1.07 m.
The reproduction of this bullhead shark is oviparous.