Super nutritious natural green seaweed sheets. Ideal for larger marine herbivores such as tangs and surgeonfish, moorish Idols, parrotfish, angelfish, large butterflyfish, and herbivorous freshwater fishes, such as cichlids and goldfish. It's a great source for vitamins and natural color enhancers. Adding this to your aquarium initiates natural feeding behavior and even works as enrichment for your fish!