Ghost crabs use teeth in stomachs to 'growl' at predators

Scientists find first evidence of an animal using stomach sounds to communicate

Angry crabs harbour a secret weapon to deter their enemies and ward off predators when their claws are busy in combat, scientists say.

Ghost crabs, named for their sand-pale bodies and nocturnal antics, use teeth in their stomachs to "growl" at aggressors, leaving their claws free for attacking manoeuvres and general waving about.