Overview

Comprehensive Description

Description

  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.   
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Biology

Inhabits sand flat and rocky, boulder strewn reef areas, with sand between outcroppings in inshore continental and insular waters. Rests motionless on the bottom. Is docile, non-aggressive and a poor swimmer (Ref. 5227). Nocturnal (Ref. 43278). Feeds on shellfish, crabs, and small invertebrates (Ref. 28023). Oviparous (Ref. 50449). Size at birth (for a newly hatched male) is 17 cm.
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Distribution

Depth

Depth Range (m): 3 (S) - 40 (S)
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Zoogeography

See Map (including site records) of Distribution in the Tropical Eastern Pacific 
 
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)

Residency: Resident

Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo), South Temperate (Peruvian Province )
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Eastern Pacific: Peru (including offshore islands) and the Galapagos Islands. There might be another Heterodontus species from Peru which is Heterodontus peruanus, but these two cannot be separated as of this time for lack of materials examined.
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Eastern Pacific.
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Physical Description

Morphology

Size

Length max (cm): 107.0 (S)
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Size

Maximum size: 1070 mm SL
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Max. size

107 cm SL (male/unsexed; (Ref. 5227))
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Type Information

Type for Heterodontus quoyi
Catalog Number: USNM 77691
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Illustration
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.
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Ecology

Habitat

Salinity: Marine, Marine Only

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
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A little-known but apparently common tropical and warm-temperate bullhead shark of inshore continental and insular waters, at moderate depths on the bottom. Lives on rocky and coral reefs, often seen resting on ledges of vertical rock surfaces at 16 to 30 m depth.
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Environment

reef-associated; marine; depth range 3 - 40 m (Ref. 5227), usually 16 - 30 m (Ref. 54549)
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Depth: 3 - 40m.
From 3 to 40 meters.

Habitat: reef-associated.
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Trophic Strategy

Feeding

Feeding Group: Carnivore

Diet: mobile benthic crustacea (shrimps/crabs), mobile benthic gastropods/bivalves, sea-stars/cucumbers/urchins, bony fishes
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Inhabits sand flat and rocky, boulder strewn reef areas, with sand between outcroppings in inshore continental and insular waters. Feeds on shellfish, crabs, and small invertebrates.
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Life History and Behavior

Life Cycle

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Distinct pairing with embrace (Ref. 205).
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Reproduction

Egg Type: Benthic, No pelagic larva, No pelagic phase
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Conservation

Conservation Status

IUCN Red List: Listed, Data deficient

CITES: Not listed
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Threats

Data deficient (DD)
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest
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Wikipedia

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 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.

References[edit]

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