The Green Brittle Star, Ophiarachna incrassata., is a species of starfish with long, flexible limbs that have small pointed projections across their bodies. They are a deep black/dark color. Sometimes there are grey bands around some of the limbs. They can grow to a max size of ten inches in limb diameter. They are incredible scavengers and need not be fed any supplemental food. They should be kept in tanks with plenty of liverock to allow it to hide and burrow. Brittle Stars, like other starfish, can regenerate their limbs if they are injured. They are a great invertebrate to have in any home aquarium as they are incredible waste cleaners and awesome to watch roam the tank. They can be aggressive with certain other organisms.