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The Crabclaw's handle is green and resembles seaweed, while its guard is light blue, adorned with a purple merman on the left and a purple mermaid on the right side. 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 Sea", reflects the fact that it is awarded to Sora after sealing Atlantica's Keyhole.