Scientific name - Calcinus sp. Family – Diogenidae Common name – Electric Orange Hermit Crabs Max Size – 2 in (3 cm) Range: Hawaii, Pacific Ocean Care Level – Easy Temperament – Peaceful Foods and feeding – This crab will scavenge debris and algae but can be feed small meaty items and algae sheets. Aquarium suitability - Reef compatibility – Yes Captive care – This crab is extremely helpful in keeping an aquarium clean, and will roam the aquarium searching for debris and algae to eat. They may kill snails for their shells so provide empty shells for them to move into as they grow. Crabs are extremely sensitive to nitrates and copper and small amounts will kill them.