Fiddler crabs use dishonest signalling to bluff about their fighting  ability. When a claw is lost, a crab occasionally regrows a weaker claw  that nevertheless intimidates crabs with smaller but stronger claws.

Fiddler crabs use dishonest signalling to bluff about their fighting ability. When a claw is lost, a crab occasionally regrows a weaker claw that nevertheless intimidates crabs with smaller but stronger claws.

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