Burbot

• It is the only gadid that lives exclusively in fresh water: the rest of the cod family is marine.
• It spawns under the ice, between February and March, forming a writhing ball of fish and building no nest.
• In the United Kingdom it is extinct, and in the lower Danube it is considered threatened by climate change.

Skeleton type

Vertebrate - internal bony skeleton (bony fish)

Habitat and environment

Deep bottoms of cold lakes and slow reaches of Holarctic rivers, between 1 and 700 m and at 4-18 °C; it shelters among roots, logs and rocks

Sexual maturity

4 years

Litter / clutch size

A large female can lay over a million eggs, about 1 mm across

Sources consulted: Wikipedia (es): Lota lota