What freshwater white fish is white and has teeth?

The freshwater white fish you are likely referring to is the northern pike (Esox lucius). This fish has a long, slender body and a white to light-colored belly, and it is known for its sharp, pointed teeth. Northern pike are predatory and can be found in lakes and rivers across North America, Europe, and Asia. Their teeth help them catch and hold onto slippery prey like smaller fish.