Here is some info from a previous post but some of it is will help you;
Most common are the Common, Misgurnus anguillicaudatus (Cantor) and Spotted, Cobitis taenia (Linnaeus) Dojos or Weatherfishes. They are often called "living barometers" of their increased activity at the approach of changing weather. These fishes are pressure-sensitive, swimming about more if its about to rain for instance and can become more or less active according to certain periods of the year.
The Common Dojo/Weatherfish is drab to light brown naturally, though there are "Golden" Dojos (xanthistic varieties, not albinos) that are human-produced. This species attains a maximum length of about twelve inches. The Spotted Dojo or Weatherfish only reaches a natural length of six inches. Both are excellent scavengers. They should be kept with their own species.
