Please do not purchace the feather star, it will not survive in your tank, it will just slowly starve to death. The are not aquacultered and therefore are always taken from the wild to sell to customers who don't have a chance of meeting it's needs. You rarely seem them in puplic aquariums because they need the small plankton that float by in currents to surive, this means the ocean. I know they are very beautiful and extremely interesting and exotic but this creatures should not have to pay the price for our desire to have such an interesting tank inhabitant. There is so many other worth while intervertebrates.