polyps change colour?
I am just wondering this as i have heard of sps
corals changeing colour, eg the zooanthelae making it drown out, along with other things. And i am now lucky enough to have this happen to a few of my sps frags
which have changed colour.
But is it just the main part of the coral which can change colour, or can the tips (if its got two colours), or the polyps change colour as well?