How many fishing companies are in antarctica?

Like in most places on Earth, fish live in large schools at the bottom of the sea, so numbering them is naturally quite difficult. However, it is estimated, that about 30 million fish do live in Antarctic waters.

These aren't any ordinary fish either. They can anti-freeze themselves so the biting coldness of Antarctica doesn't kill them. I'm not sure what the species of fish are, but I know cod is one of them.