The Crabclaw (トレジャーオブシー Torejā obu Shī?, lit. "Treasure of Sea") is a Keychain for Sora's Keyblade which appears in Kingdom Hearts, Kingdom Hearts Final Mix, Kingdom Hearts: Chain of Memories, and Kingdom Hearts Re:Chain of Memories.
The Crabclaw's handle is green and resembles seaweed, while its guard is light blue with a purple mermaid adorning both sides. The shaft of the blade is light blue, thin, and resembles a jet of water. The teeth are comprised of a simple, orange crab with its claws pointing outward. The Keychain token is a light blue seashell.
The Crabclaw's name is a clear reference to the crab that make up the weapon's teeth. The Japanese name, "Treasure of the Sea", reflects the fact that it is awarded to Sora after sealing Atlantica's Keyhole.