Hikari is the world's first producer to successfully develop a nori seaweed pellet that herbivorous fish love. Hikari Seaweed Extreme contains no less than 67% nori seaweed. Say goodbye to nori sheets polluting the aquarium water. Seaweed Extreme is the ideal complementary food for most herbivorous fish and also for omnivores such as clownfish, seabirds, and butterflyfish. – Daily food for herbivorous marine fish. – Contains at least 67% nori seaweed. – The alternative to nori sheets.