The Gastric Mill for Acoustical Communication in Ghost Crabs

The way the gastric mill works is that sort of chews the food from inside the stomach by grinding it between these hard parts, like plates or surfaces. The ghost crab appears to use this stridulation of rubbing its claws as a a, as a warning sign, as signs like, hay, i am dangerous. I've got these big claws. You do not want to get near me. But in dition to the strigulation, they make with there with their claws, to quote from the abstract of this paper, by a tailor at all.