Cleaner shrimp went into my BTA and pulled some long dark stringy thing out of the anemone's mouth. Does anyone know what this would be and is is natural for a cleaner shrimp to do this? I just got the BTA last Thursday. It's about 3". The LFS sold me krill to feed it, but I don't see nayone on this forum feeding their's krill. Did he tell me wrong? And how much do I fed it at one time?