Heterodontus quoyi

Galapagos bullhead shark | Peruvian Horn Shark
Heterodontus quoyi
Heterodontus quoyi, Galapagos Islands, Ecuador, Photo: Graham Edgar




Mottled grey-brown with a covering of diffuse black blotches, and a short bony spine in front of each dorsal fin. Generally found sitting on the sea floor. Within it\'s distribution found in colder waters where upwellings are strong.


Max Size: 107 cm

Sea Temperature Range: 20.7-26.6°C

Depth: 3-40m

Habitat Generalization Index: N/A

Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.

Conservation and Rarity

IUCN Status: Data Deficient

Occurrence: Common (42.3% of sites)

Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed

Abundance: Solitary (1 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: Joe Shields