Lagoona Blue

She and her younger siblings are an unusual kind of sea monster, as they are the offspring of a sea monster and an ocean nymph. Lagoona is a student at Monster High, having come all the way from the Great Scarrier Reef to expand her horizons. And she's done so admirably. If there is one person in the entire school who could befriend anyone, it's Lagoona. She is patient, kind, and considerate, but does not sugarcoat her message or allow anyone to walk over her. This, along with her considerable skill, is why she's been chosen as the captain of the Swim Team.