Mandarinfish🐠 Ocean's Most Beautiful and Colorful Creatures | All About Animals The Mandarinfish (Synchiropus splendidus) is a small, brightly colored fish native to Indo-Pacific coral reefs. It features vibrant blue, orange, and green patterns, lacks scales, and has a protective mucus coating with toxins. Growing up to 8 cm (3 inches), it feeds on small crustaceans and plankton. Mandarinfish are nocturnal, territorial, and known for their unique spawning behavior, where pairs rise in a spiral