Sera marin O-Nip is a highly nutritious treat food that can be attached to the aquarium glass. This treat is great for encouraging shy fish to come out to eat instead of waiting for food to be carried to them by the current. With ingredients such as krill, bloodworms, and tubiflex worms, you can be assured that your fish are getting the high quality nutrition they deserve! These high quality ingredients as well as added protein are easily digested by the fish and support growth, development, appearance, and natural foraging behavior in the fish.