Scientific name - Stenorhynchus seticornis Family – Majidae Common name – Arrow, Spider Crab Max Size – 6 in (15 cm) Range: Caribbean Care Level – Easy Temperament – Semi-Agressive Foods and feeding – This crab will scavenge but can be feed small meaty items. Supplements - Calcium, Magnesium, Iodine, Trace Elements Aquarium suitability - Reef compatibility – Yes Captive care – This crab may go after other crabs or small, slow moving fish. They are opportunistic predators. Crabs are extremely sensitive to nitrates and copper and small amounts will kill them.