Mine never touched my clams, had three in the tank....though this doesn't mean that others wont. I feed mine PE mysis, brine, mysis, rods food (which has A LOT of stuff in it) And now I'm feeding it aptasia and feather dusters....more aptasia though, easier to grow. Those later two are a huge part of it's natural diet and will help the longevity of this fish in captivity.....at least that's what I believe.