Some type of soft coral

Hello! I recently bought this soft coral, but when the worker told me it's name i was in a trance (lol, i was thinking of something else, even though i did understand the name but i forgot). So can anyone identify it?
Its that kind of polyp that opens and closes to make water flow through it and catch plankton.

Sorry for the foxface he always follows me when i get near the tank and i couldn't get a picture without him in it. lol
 
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