Originally Posted by coral6740
I have a question about a choc star. Purchased one on Saturday along with a cleaner shrimp and a threadfin butterfly...the butterfly and shrimp are fine...but the star is on the bottom of the tank with his arms pulled in. the butterfly has been picking at him from the time i put all of them in the tank. they all went in at the same time. is this normal behavior for the star as a defense mechanism or is he sick?
First, it doesn't surprise me about the butterfly. In the wild they are known to pick at things like tube worms, so the tube feet of the seastar would be similar in appearance.
What are your water parameters? Note that seastars are quite delicate, and what is "perfect" for fish and some other inverts can be fatal to seastars.