They are uniformly blue with a yellow spot on their heads that fades as they age. They average 30–75 cm in length with a maximum length of 1.2 m. They develop a large "beak" like other parrotfish that is used for scraping algae and small organisms from rocks.
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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.
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Their diet consists of small organisms found in the sand and algae that they scrape off rocks. They spend 80% of their time searching for food.
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