Features Underwater feeding aid for “shy” fish. Firmly grips or holds a defrosted cube of gel-based Frozen Formula Foods™. Excellent for butterflies and other picky feeders. In their natural coral reef environment, Marine Butterfly fish, Angels, Tangs, and many other fish feed by picking throughout the day on surfaces of coral heads and live rocks. The FEEDING FRENZY™ Grid Feeding Clip helps to duplicate natural feeding behavior by holding food intact and prolonging the feeding process so fish are not forced to eat their entire day’s food in a five-minute rush.