Pseudotriakis, a small-toothed quasi-lipped shark.
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Pseudocristaceae is the only extant species of Pseudocristaceae and the largest species of Pseudocristaceae with a maximum body length of 2.95M. It distributes in the temperate and subtropical waters of the world. The distribution area is very scattered. It is usually found in the slope of the continental shelf and deep waters with a depth of 173-1890M, mainly feeding on fish, crustacephalopods and even in the waters of the Canary Islands. The stomach contains human garbage, which contains a huge liver, accounting for 18-25% of the body weight, to control ups and downs. The Pacific population of the small-toothed rumpled lip shark was once considered to be an independent species P. acrales, which was later confirmed to be the same species as other populations. At present, we know little about this species.
IUCN assesses its population as LC. Occasionally, the small-toothed quasi-lipped shark becomes an accessory catch for bottom trawling and longline fishing. However, its economic value is low and it is often discarded after capture. In Okinawa, Japan, the extracted fish oil is used as coating for traditional wooden fishing vessels. Because of its low reproductive rate, the small-toothed quasi-lipped shark population is very vulnerable to serious threats of overfishing. At present, its population may be positive. Hit by overfishing