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 Galapagos bullhead shark (Heterodontus quoyi)

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Galapagos bullhead shark
No image of Galapagos bullhead shark found in the Shark Database
 Range Map

Earth Map


Phylum: Vertebates (Chordata)

Class: Carlilagenous Fishes (Chondrichthyes)
  Order: Bullhead sharks (Heterodontiformes)
    Family: Bullhead sharks (Heterodontidae)
      Genus: Heterodontus (Heterodontus)


Scientific: Heterodontus quoyi
German: Galapagos-Stierkopfhai
English: Galapagos bullhead shark, Peruvian horn shark
French: Requin dormeur bouledogue
Spanish: Dormilón de Galapagos, Gato, Suno, Tiburón Gato de Galápagos, Tiburón Tamborí N


Cylindrical trunk with conical head, small spiracles behind and below the eyes. Very short snout, bluntly rounded. Low supraorbital ridges that do not abruptly end behind the eyes. Both dorsal fins with a stout fin spine. Origin of first dorsal fin behind pectoral fin bases. Origin of second dorsal fin well behind the pelvic fins. Large pectoral fins. Anal fin present.


Light brown or grey with large black spots (greater than 1/2 eye diameter in width) over entire body. No light transverse band on interorbital space present.


Eastern Pacific: Peru and Galapagos Islands


Lives in inshore continental and offshore waters, preferably on the bottom. A little-known species.


Feeds primarily on crabs.


Maximum size about 60 cm, average size between 40 and 50 cm.


Most likely oviparous (egg laying). Shape of egg cases uncertain. Size at maturity unsure,though one male was 48 cm. Hatch size is also uncertain, though one young was 17 cm.

 Similar Species

Although other "bullhead sharks" have a similar appearance the distribution and color pattern of this species are very distinctive.


Status in the IUCN Red List(Version 2001):

Main criterion: > DD (Data Deficient)
Sub criterion:
Trend: Unknown

 Danger to Humans


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