The Riddler crab is a crablet found in the Port district of Menaphos on the dock south-west of the player-owned port portal. It will give you an alaeite in exchange for answering its riddle. The answer is "crab".
The riddler crab only appears on certain worlds, and is a part of Jewels of the Elid.
- Its name is a pun on the fiddler crab.