Crabs will eat pretty much anything that fish will eat. Best choices for food would be Algae Wafers and sinking pellets. They especially love shrimp. Shrimp pellets are an excellent choice. It's not...
Crabs are omnivores, feeding primarily on algae, and taking any other food, including molluscs, worms, other crustaceans, fungi, bacteria and detritus, depending on their availability and the crab...