Male Mustard Gas Halfmoon BettaThese are the glorious males whose photography is an instant Instagram hit. Long, fluttery tails and dorsals make these boys look like living, breathing flowers. So stunning! With its stunning deep ocean blue body and a beautifully contrasting pale blue and yellow orange halfmoon tail, the Male Mustard Gas Halfmoon Betta is a must have for any betta enthusiast. This unique color combination is sure to make a statement in any aquarium. Halfmoon Bettas