straighttooth weasel shark

Another elusive shark in the Western Pacific.

The Straighttooth Weasel shark, (Paragaleus tengi), is a Weasel shark of the family Hemigaleidae, found in the tropical Western Pacific Ocean.


Family: Hemigaleidae – Weasel sharks

Genus: Paragaleus 

Species: tengi


Phylum– Chordata

Class– Chondrichthyles



Common NameGround Sharks

Family– Hemigaleidae

Common NameWeasel Sharks




Average Size and Length: The Straighttooth Weasel shark reaches a length of 2.5 to 2.9 feet in length.  

Teeth and Jaw: The mouth is short and arched. The lower teeth don’t protrude much out of the mouth.

Head: It has a long, rounded snout. It has large, lateral eyes with nictitating membranes and small spiracles.

Demographic, Distribution, Habitat, Environment and Range: The Straighttooth Weasel Shark can be found in the West Pacific in Thailand (the Gulf of Thailand), also in Vietnam, southern China, Taiwan and Japan. They can be found inshore, although there are no confirmed reported depths yet.

Aesthetic Identification: The Straighttooth shark is a small, light grey and slender shark. It has no prominent markings. It has moderately long gill slits that are 1.2 to 1.3 times the eye length in adults. They are shorter in juveniles.

Biology and Reproduction: The Straighttooth Weasel shark is viviparous.

Straighttooth Weasel Shark Future and Conservation: Not evaluated.

Straighttooth Weasel Shark Recorded Attacks on Humans: Not a threat to humans.