Hello everyone! I am about three months in to a new Red Sea xl425 and just happened to look at my tank in the dark last night and noticed these little guys. I saw 4 of them and they hated the direct light. I would describe them as white body with a pink back/center and two lengthy antennae. Are these stomatellas or are they a nudibranch? Friends or foes? They were only on and in rock, not touching any livestock. Thanks for the help!