Id Please

[psycho-killer]

sorry for all the id's,but weird things happen with my rocks that i get with corals on them,my normal live rock didnt have any weird stuff on it, anyway,my anthelia rock in the night has a strange thing its see through like tentacles about 1-2 cm long it retracts up and down,doesnt seem to have a body of any sorts,and will now and again spurt out a whitish substance..

im not touching it if u want me to remove it hehe will see tonight if i can get a pic but i doubt it..