Paul what is that green coral underneath the zoas? I like the way it grows, and it has some crazy long sweepers!
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That is a galaxea coral. You ought to see it when all the sweepers are out, that thing is insane. Nasty sting to all other corals though. Wouldn't recommend it in a smaller tank with alot of other coral. It does however add alot of movement to the tank. I love it, but its starting to get pretty big!