The Freshwater High Cheer Squad is a group of cheerleaders at Freshwater High. They serve as recurring background characters.
They first appeared holding the "Fighting Fish Hooks" mascot for Coach Salmons to announce the football players' entrance. When the football team was playing their big game at the Gecko tank, the cheer squad was cheering for them, but dehydrated because they had no water. They then cheered for Milo when he was saving the game as the water boy ("Underwater Boy"). Most of the cheerleaders were taken away from the tank once, except for Clamantha, so Koi, Bea, Milo, Oscar, Esmargot, and Finberley joined to participate in the Cheer Off. However, the cheerleaders appear in the series in future episodes, meaning the scene was probably just for a gag ("We've Got Fish Spirit").
One of the Cheerleaders is Finberley's sister, as revealed on Noah Z. Jones' Facebook account. it is unknown which one she is.