What do crabs eat?

Crabs are omnivores and eat a wide variety of foods, especially favoring small fish and shrimp as live prey, and occasionally seaweed and animal carcasses. In captivity you can also feed them earthworms, bloodworms, snails, fish food, and mealworms, with the occasional supplement of greens, rice, or fruit for balanced nutrition. Their appetite is small — feed once or twice a day, and avoid overfeeding so leftover food does not spoil the water.