The weatherfish (Misgurnus fossilis) is a species of true loach that has a wide range in Europe and some parts of Asia.

It is an omnivorous scavenger bottom feeder, using its sensitive barbels to find edible items.

[2] The weatherfish is long and thin which allows it to burrow through the substrate and navigate through places that deeper bodied fish would have trouble with.

Adult weatherfish live in dense patches of aquatic vegetation while juveniles prefer to live near the shoreline in very shallow water where there is a lot of detritus; neither adults nor juveniles are found in open areas without vegetation.

[5] Because of their habitat preferences, dredging and aquatic weed removal poses a danger to weatherfish populations.