: any of several European and Asiatic loaches (genus Misgurnus) that burrow in mud at the bottom of streams and ponds but are supposed to become restless and swim about during thunderstorms — compare dojo
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/wedh"euhr fish'/, n., pl. (esp. collectively) weatherfish, (esp. referring to two or more kinds or species) weatherfishes.
any of several loaches of the genus Misgurnus, esp. the European M. fossilis, which shows increased activity in response to changes in barometric pressure.
[1885-90; WEATHER + FISH]
Useful english dictionary. 2012.