There are many animals that live in or near Lake Superior. One adaptation example is the Sculpin fish. This fish has adapted to the darkness, and is mostly nocturnal. They feed at the bottom of the lake.
Lake Superior is 3 Quadrillion Gallons
great sharks are salt water fish and do not live in freshwater bio mes like lake superior. the shark would become the top of the food chain and would all the fish which would take other animals food away and the whole thing would collapse