Mustard Gas Betta Splenden Fish Royalty-Free Stock Photography

The term `Mustard Gas` was originally coined by breeder/hobbyist Jude Als to describe his particular line of multicolored bettas. The original Mustard Gas bettas were green-bodied fish with variegated bands of blue or green, yellow, and black. In 1999, Als added a band of white as well, developing certain specimens of Mustard Gas into a four-banded butterfly, the colors of which were never clearly separated, but rather run together, creating an effect that looked like gas to its creator.