Krk Island is the largest island in the Adriatic Sea and is a popular destination for divers of all levels. The island has a variety of dive sites, including caves, reefs, and shipwrecks. The marine life in Krk Island is diverse and includes fish, coral, sponges, and nudibranchs. Some of the most popular marine life to see in Krk Island include: Groupers: Groupers are large, predatory fish that can grow up to 7 feet long. They are often found in caves and reefs. Damselfish: Damselfish are small, colorful fish that are often found in coral reefs. They are very territorial and will defend their nests from other fish. Moray eels: Moray eels are long, slender fish that live in holes and crevices. They can be dangerous to divers if they feel threatened.