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The horn shark (Heterodontus francisci) is a species of bullhead shark, in the family Heterodontidae. It is endemic to the coastal waters off the western coast of North America , from California to the Gulf of California .
The Mexican hornshark (Heterodontus mexicanus) is a bullhead shark of the family Heterodontidae. This shark is grey-brown in color, with black spots scattered on the fins and body. It has a cylindrical trunk, conical head, and small spiracles behind the eyes. The snout of the Mexican hornshark is very round and blunt.
It was previously considered conspecific with the Zebra bullhead shark. [1] It is found from North West Cape to Bathurst Island. The painted hornshark looks much like a zebra shark with its dark bar and saddle coloring as shown, but the coloring of the tip of the snout and its fins is the difference between the two. [1]
Ten living species of bullhead shark have been described: Heterodontus francisci (Girard, 1855) (horn shark) Heterodontus galeatus (Günther, 1870) (crested bullhead shark) Heterodontus japonicus (Maclay & W. J. Macleay, 1884) (Japanese bullhead shark) Heterodontus marshallae White, Mollen, O'Neill, Yang & Naylor, 2023 (painted hornshark)
There are numerous species of sharks found in the Pacific Ocean; of these sharks, 36 [1] have habitat ranges throughout the coastlines and surrounding waters of California, as identified below. Identifications include common names; scientific names; the taxonomic rank, family; conservation statuses according to IUCN; and an image.
The first shark-like chondrichthyans appeared in the oceans 400 million years ago, [1] developing into the crown group of sharks by the Early Jurassic. [2] Listed below are extant species of shark. Sharks are spread across 512 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
A small species typically measuring 1 m (3.3 ft) in length, the horn shark can be recognized by a short, blunt head with ridges over its eyes, two high dorsal fins with large venomous spines, and a brown or gray coloration with many small dark spots.
Heterodontiformes is an order of sharks in the superorder Galeomorphii.It includes the bullhead sharks (genus Heterodontus), and several extinct genera.The earliest known members of the group are from the Early Jurassic (), around 175 million years ago.