i just picked up a beautiful photosynthetic gorgonian, muriceopsis flavida, or purple frilly bush or whatever you want to call it, i rarely see these in the store and this one was open and feeding like ive never seen ( and i got it for 15 dollars). anyways i am aware of most of their husbandry requirements, but unsure of there threat to other corals. i understand they produce sweeper tentacles but i have no idea how long these are or what time of day they use them at, i have it placed near a montipora cap, and some mushrooms. The gorgonian is about 4 to 5 inches tall. anyone who has experience please help me out. I'll post a pic later.