Meaning of weatherfish

weath•er•fish

Pronunciation: (we'ur-fish"), [key]
— pl. -fish, -fish•es.
  1. any of several loaches of the genus Misgurnus, esp. the European M. fossilis, which shows increased activity in response to changes in barometric pressure.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.