 It is vital to make sure tank mates can tolerate similar environmental conditions.Red Claw Crabs are omnivores that readily accept a variety of foods, including shrimp pellets, fish flakes, brine shrimp, bloodworms, blanched vegetables, and nearly anything else they can get their claws on due to their opportunistic behavior.Male Red Claw Crabs tend to have larger, redder claws and are more brightly colored, whereas the females have smaller, darker claws.