Dusky Catshark

Bythaelurus canescens is deep-sea shark, generally located between depths of 250–1,260 m (820–4,130 ft). It lives primarily on mud on the upper continental slopes, but can also be found on rocky bottoms. It is an important mesopredator, and is often caught it shrimp trawl nets in northern and central Chilean coasts. Sometimes B. canescens makes up to 20.3% of the total catch. In spite of this, little is known about it because it is often thrown back without further consideration. Trophic ecology studies are often done on B. canescens to obtain a general overview of their diet.