The mermaids appeared in the premiere of Season 3, "Heart of the Truest Believer". They were depicted as dangerous in Neverland, though affiliated with Peter, like in the original novel. Like the mermaids of Pirates of the Caribbean: On Stranger Tides, these tend to take an alien, predacious, and perhaps even villainous role, though their individual personalities and moralities may differ. Like Aquarianne from Disney's Adventures of the Gummi Bears, some carry a conch shell which can be used as a magic flute. They are perhaps the most powerful ones ever produced by Disney; gifted with magic so great it can control the very weather itself.