Leost are massive armored fish. They are relatively slow, but powerful swimmers. Instead of teeth, It possesses two pairs of sharp bony plates which formed a beak-like structure. It can concentrate a pressure of up to 8,000 pounds per square inch (55 MPa) at the tip of its mouth, giving it one of the most powerful known bites. It can open its mouth in one-fiftieth of a second, which causes a powerful suction that pulls prey into its mouth.
Leost live in Seas and Oceans. There is no fresh water versions of the Leost known to exist.
Leost are carnivores. They hunt all marine animals smaller than they are.
Leost are solitary creatures usually only meeting up to mate.