A chull is a crustacean creature common to Roshar. There are many breeds of the animals and they come in a variety of shapes and sizes. Domesticated chulls are often used in place of horses for hauling. Large chulls are nearly as big as the wagons they haul and, when pulled into their shells for the night, appear as lumps in the darkness, barely distinguishable from boulders.
Chulls have red carapace, thick red legs with claws, and bulging shells like stone. It was said their claws could snap a man's arm, however, chulls are docile, particularly domesticated ones and are not known to harm anyone.
The shells are lighter than they appear and chulls are not hurt when the shells are cracked or shaped. Some people sand flat places on top to ride, and many carts are hooked to fitting drilled directly into the shell.
There are two major ways of directing a chull. One is similar to that of a horse, with complex leather workings, and the other involves tapping the antennae of a chull with a long pole to indicate direction.