Wolffish

The spotted Wolfish is a very unique animal that creates it's own antifreeze to help it navigate the cooler waters. It is native to the North Atlantic. This fish does not have scales, which makes its leather very smooth. Instead of the female depositing her eggs in the open ocean for the male fish to fertilize and then continue on his way, they are internally fertilized and the male wolffish stays with the nest and protects the eggs for as long as four months.

It iiscurrently listed as a Species of Concern, and is not listed as endangered.   Wolffish leather is almost out of production, and it is very rare to find now.  Unfortunately, this means the price has increased.