Cloud Piranha

Cloud Piranha are piranha like enemies with some sort of helm on its head. When near an edge of a cloud, an easy way for them to die is if they jump out at you, you dodge out the way, and they could fall off the clouds and down through the sky.

Quote from The Minish Cap Cloud Piranha figurine: "Appears in the sky. They swim through clouds like fish in water. Attack them in that brief moment when they pop out!"