The sea hosts about 80 species of zooplankton , more than 70 species of phytoplankton , and nearly 700 species of polychaetes , bryozoans , crustaceans and mollusks , but their total volume is relatively small owing to the cold climate .
The sea has about 80 species of zooplankton , more than 70 species of phytoplankton , and nearly 700 species of polychaetes , bryozoans , crustaceans and mollusks .