http://i5.photobucket.com/albums/y153/keyozoxmfc/IMG_0338-1.jpg
http://i5.photobucket.com/albums/y153/keyozoxmfc/IMG_0340.jpg

does anyone know what that is?? it came on the rock with my zoos. it only opens up at night . is it bad? or normal?

some type of nudibranch?

You're gonna have to point to what we are looking at and give a little description.

http://i5.photobucket.com/albums/y153/keyozoxmfc/CopyofIMG_0338.jpg
ehh sorry i think thats the best i can do. it is kinda like a redish bumpy pipe that like lifts itself up in the dark and sticks out thin feelers...kinda like a button polyp. but it has like a branch

is that one in the bottom right hand corner too?

yeah but it doesnt open up as much..

It most likely isn't harming anything and just doing routine cleaning, but just keep an eye on things.

It's not a zoa-eating nudi.

Looks like some kind of tube worm. Does it completely disappear bumpy tube and all or is the tube always there? Is the tube flexible or rigid?

uhh its always there, just at night it raises and opens like that.