(25) Blue Leg Hermit Crabs for Saltwater Reef Fish Tank Aquarium Coral Algae Care Level: Very Easy | Size: 0.25-0.5 inch Diet: Detritus, Hair/Macroalgae Compatibility: Completely Safe with all Fish, Inverts and Coral 100% Live Arrival Guarantee. See Description for details Orders over $149 Receive Free Shipping. Build your order from our store and save.