The Arrow Crab is not only an interesting addition to most aquariums it is also quite beneficial in several ways. Arrow Crabs are scavengers that can be placed in most salt-water aquariums, the only exception being those aquariums that contain triggerfish or other fish that may be likely prey on them. In addition to providing a benefit to the aquarium by scavenging waste products the arrow crab also eats small worms including bristle worms. Since bristle warms are highly aggressive and can kill many types of coral these crabs are very important. Arrow crabs generally feed at night, however, they are often seen during the day as well. Arrow Crabs are generally not aggressive, however, keeping multiple arrow crabs in a single aquarium can cause some territorial conflicts between them. If you're going to keep more than one crab per aquarium be sure to supply multiple hiding places to help them avoid running into each other. These crabs do best in miniature reef aquariums with lots of live rock, however, they can also be kept in a standard community aquarium with an under gravel filter. Arrow Crabs have a small triangular or arrowhead shaped body and very long legs. They resemble a " Daddy Long legs " spider. As with most crabs they do have two main claws which are small and slender and are perfect for reaching into small crevices and holes in search of prey. In addition to worms and general scavenging Arrow Crabs will eat all types of food not eaten by other fish. Arrow Crabs are found in oceans throughout the world however many destined for the pet trade originate in the Caribbean. | 
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