The blue kind is the coolest of all. I had a problem with it growing fast. I had three rocks that were baseball size covered with it in six months. Everywhere a single piece lands there will be ten in a week or two. I got rid of all but a snail shell of it.
The first coral I ever bought was a blue anthelia.But then I had a cyano outbeak and used some chemi-clean.Well the chemi-clean cleaned out my anthelia along with the cyano.
Mine are TAKING OVER. And unfortunately, they are on a rock that's at the bottom of my rock pile, supporting everything else above it. On the same rock, I have a colony of red zoas, two ricordeas and a colony of lord of the rings zoas. The GSP are starting to cover all the other corals on the rock. I don't know what to do about it!