What roll does the gastric mill play in digestion a crayfish?

Crayfish, like many other crustaceans, do not have a gastric mill. Instead, they have specialized teeth on their mandibles and gastric ossicles in their foregut that aid in the mechanical breakdown of food. The gastric mill is a structure found in some animals, particularly those that consume tough plant material. It consists of muscular ridges or plates lined with teeth or hard structures that help grind down food particles and facilitate digestion.