The finest quality seaweed dried and formed into sheets for ease of feeding. Seaweed contains essential vitamins, minerals and trace elements that many species of fish require in there daily diet. Saltwater Species: Tangs, Angels, Moorish Idols, Wrasses, Parrot fish, Damsels, some large Butterfly fish and all other saltwater algae grazers Freshwater Species: Plecos, African Cichlids, Fancy Goldfish, Live Bearers, Kissing Gouramis, and all other freshwater algae grazers.