This normal?

[bignose]

I got this clove coral about a month ago. I don't know much about them and have a question for everyone. The coral used to shorten at night but it's almost like it's flattening at night now. Is this normal? should I be concerned?

Here is a picture. Look at the the flat ones on the top right side of the colony compared to the rest.
http://i379.photobucket.com/albums/oo233/jasoncompton1/pipeorgan.jpg

Jason.

[mark]

Looks more like Organ-pipe (Tubipora musica) and mine retract at night but never noticed flattening. Would say if still extending normally during the day, probably nothing to worry about.

[Jack]

I agree with mark.