00:04New research has found Atlantic ghost crab's stomachs growl and it's not
00:09because they're hungry. Scripps Institution of Oceanography researchers
00:12discovered they use teeth in their stomachs to growl at enemies. It sounds
00:17crazy but listen to this. Ghost crabs don't have teeth in their mouths but
00:25they have some chompers in their gastric mill or gut. They're usually used to
00:29munch on food but researchers found they also use them to scare predators in
00:34hostile situations when their pincers are occupied. The crabs make aggressive
00:38sounds with their pincers too but the team noticed another sound while
00:42studying them. They couldn't see where it was coming from externally so they
00:46looked internally with an x-ray and found the vibrations in the gastric mill.
00:51Researchers say it's the first evidence of an animal using stomach sounds to
00:55communicate. The findings were published in the Proceedings of the Royal Society B
00:59Biological Sciences.
