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 Mexican hornshark (Heterodontus mexicanus)

  Index
> Photo
> Range Map
> Systematics
> Name
> Appearance
> Coloration
> Distribution
> Biology
> Feeding
> Size
> Reproduction
> Similar Species
> Endangerment
> Danger to Humans

 Photo

Mexican hornshark
No image of Mexican hornshark found in the Shark Database
 Range Map

Earth Map


 Systematics

Phylum: Vertebates (Chordata)

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


 Name

Scientific: Heterodontus mexicanus
German: Mexikanischer Stierkopfhai
English: Mexican hornshark
French: Requin dormeur buffle
Spanish: Dormilon bufalo


 Appearance

Cylindrical trunk with conical head, small spiracles behind and below the eyes. Very short snout, bluntly rounded. Supraorbital ridges low which do not end abruptly behind the eyes. Both dorsal fins have a stout fin spine. Origin of first dorsal fin over base of pectoral fins. Origin of second dorsal fin behind insertion (end) of pelvic fins. Pelvic fins as large or larger than dorsal fins. Large pectoral fins. Anal fin present.

 Coloration

Grey-brown. Scattered large black spots on fins and body, light transverse band between supraorbital ridge on the interorbital space.

 Distribution

Eastern Pacific: Southern Baja California, Gulf of California, Guatemala, Gulf of Panama, Colombia.

 Biology

Lives on rocky bottom and sandy areas, from inshore waters down to at least 20 m.

 Feeding

Feeds on invertebrates.

 Size

Maximum size about 70 cm, average size between 50 and 60 cm.

 Reproduction

Oviparous (egg laying). Egg cases with thick T-shaped spiral flanges (paired), case apex with very long tendrils, 5 turns visible on sides.

 Similar Species

Other bullhead sharks have a similar appearance but this species is the only on in the described area.

 Endangerment

Status in the IUCN Red List:


No Entry found in Red List.


 Danger to Humans

Harmless.



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