This shark of Bali and Indonesia needs more research

The Whitefin smoothhound (Mustelus widodoi) is a shark belonging to the family Triakidae. It is found in the western Pacific in Bali and Indonesia. It is a more recently discovered shark by White and Last in 2006.


Family: Triakidae – Houndsharks

Genus: Mustelus 

Species: widodoi


Phylum– Chordata

Class– Chondrichthyles


Common NameGround Sharks

Family– Triakidae

Common NameHoundsharks




Average Size and Length: A mature female was measured at 108.5 cm/3.5 feet.

Teeth and Jaw: There are about 73/69 rows of teeth that are exposed evenly around the symphysis of the lower jaw when the mouth is closed.

Tail: The terminal caudal lobe has a distinct black tip.

Demographic, Distribution, Habitat, Environment and Range: The Whitefin smoothhound is found in the western Pacific in Bali and in Indonesia. It is tropical benthopelagic, found at a depth range of between 197-394 feet.

Aesthetic Identification: The Whitefin smoothhound is a moderately sized shark. It has a low preanal length to anal-caudal space of 7.1-8.7, and to the dorsal-caudal space of 5.3-6 ratios. It has moderately large dorsal fins sitting upright, with a base length of the first dorsal fin 1.3-1.5 times the anal-caudal space. The first dorsal fin has a broad white margin. The apex of the second dorsal fin has a distinct black margin. The claspers of adult males are ending well short of the anal-fin origin.

Biology and Reproduction: There are 86-89 precaudal vertebrae centra, and 33-35 monospondylous centra. Reproduction is unknown.

Behavioral Traits, Sensing and Intelligence: Unknown.

Whitefin Smoothhound Future and Conservation: There is not enough data to evaluate currently.

Whitefin Smoothhound Recorded Attacks on Humans: Not a threat to humans.