Burbot is the only cod species that lives in fresh water. It is found in clear moving water or in clean deep lakes. During the day, the fish hides in the depths or under stones or hollows. The fish hunts actively at dusk and at night. Just like cod, it has a barbel on its chin, which it uses to search the bottom for food. When the burbot is young, it eats mostly insect larvae, gammarids and water louse. After growing to 20-40 centimeters, the fish switches over to a diet of fish.