This vibrant blue fish is a species of parrotfish native to the tropical waters of the Caribbean and the western Atlantic Ocean. It has a unique body shape, with its head resembling that of a parrot and its body covered in blue scales. It feeds on algae and other plant matter,
From Wikipedia
The blue parrotfish is a member of the parrotfish genus Scarus. It is found on coral reefs in shallow water in the tropical and subtropical parts of the western Atlantic Ocean and the Caribbean Sea. They usually forage in a group of 500 individuals for spawning and deterring predators while feeding.