Triakidae

The leopard shark (Triakis semifasciata), the most well-known member of the triakidae

### Conservation Status:

Extant

**Houndsharks**, the **Triakidae**, are a family of ground sharks, consisting of about 40 species in nine genera. In some classifications, the family is split into two subfamilies, with *Mustelus*, *Scylliogaleus*, and *Triakis* in the subfamily **Triakinae**, and the remaining genera in the subfamily **Galeorhininae**.

Houndsharks are distinguished by possessing two large, spineless dorsal fins, an anal fin, and oval eyes with nictitating eyelids. They are small to medium in size, ranging from 37 to 220 cm (1.21 to 7.22 ft) in adult length. They are found throughout the world in warm and temperate waters, where they feed on fish and invertebrates on the seabed and in midwater.

## Genera and Species

* Genus *Furgaleus*
	+ *Furgaleus macki* (whiskery shark)
* Genus *Galeorhinus*
	+ *Galeorhinus galeus* (school shark)
* Genus *Gogolia*
	+ *Gogolia filewoodi* (sailback houndshark)
* Genus *Hemitriakis*
	+ *Hemitriakis abdita* (Deepwater sicklefin houndshark)
	+ *Hemitriakis complicofasciata* (Ocellate topeshark)
	+ *Hemitriakis falcata* (Sicklefin houndshark)
	+ *Hemitriakis indroyonoi* (Indonesian houndshark)
	+ *Hemitriakis japanica* (Japanese topeshark)
	+ *Hemitriakis leucoperiptera* (Whitefin topeshark)

Genus *Hypogaleus*

* + *Hypogaleus hyugaensis* (blacktip tope)
* Genus *Iago*
	+ *Iago garricki* (Longnose houndshark)
	+ *Iago omanensis* (Bigeye houndshark)

Genus *Mustelus*

* + *Mustelus albipinnis* (White-margin fin houndshark)
	+ *Mustelus antarcticus* (Gummy shark)
	+ *Mustelus asterias* (Starry smooth-hound)
	+ *Mustelus californicus* (Gray smooth-hound)
	+ *Mustelus canis*
		- *M. c. canis* (Dusky smooth-hound)
		- *M. c. insularis* (Caribbean smooth-hound)
	+ *Mustelus dorsalis* (Sharptooth smooth-hound)
	+ *Mustelus fasciatus* (Striped smooth-hound)
	+ *Mustelus griseus* (Spotless smooth-hound)
	+ *Mustelus henlei* (Brown smooth-hound)
	+ *Mustelus higmani* (Smalleye smooth-hound)
	+ *Mustelus lenticulatus* (Spotted estuary smooth-hound)
	+ *Mustelus lunulatus* (Sicklefin smooth-hound)
	+ *Mustelus manazo* (Starspotted smooth-hound)
	+ *Mustelus mangalorensis* (Mangalore houndshark)
	+ *Mustelus mento* (Speckled smooth-hound)
	+ *Mustelus minicanis* (Dwarf smooth-hound)
	+ *Mustelus mosis* (Arabian smooth-hound)
	+ *Mustelus mustelus* (Common smooth-hound)
	+ *Mustelus norrisi* (Narrowfin smooth-hound)
	+ *Mustelus palumbes* (Whitespotted smooth-hound)
	+ *Mustelus punctulatus* (Blackspotted smooth-hound)
	+ *Mustelus ravidus* (Australian grey smooth-hound)
	+ *Mustelus schmitti* (Narrownose smooth-hound)
	+ *Mustelus sinusmexicanus* (Gulf smooth-hound)
	+ *Mustelus stevensi* (Western spotted gummy shark)
	+ *Mustelus walkeri* (Eastern spotted gummy shark)
	+ *Mustelus whitneyi* (Humpback smooth-hound)
	+ *Mustelus widodoi* (White-fin smooth-hound)
	+ *Mustelus sp.* Not yet described (Sarawak smooth-hound)
	+ *Mustelus sp.* Not yet described (Kermadec smooth-hound)

* Genus *Scylliogaleus*
	+ *Scylliogaleus quecketti* (Flapnose houndshark)

* Genus *Triakis*
	+ *Triakis acutipinna* (Sharpfin houndshark)
	+ *Triakis maculata* (Spotted houndshark)
	+ *Triakis megalopterus* (Sharptooth houndshark)
	+ *Triakis scyllium* (Banded houndshark)
	+ *Triakis semifasciata* (Leopard shark)