Galaxea
Galaxea
One thing to note about Galaxea corals - They are beautiful, but can be dangerous to other corals. They have a long sweeper tentacles (4-6"), that can do remote burning of other corals.
That being said, I have a Galaxea, and so far, it hasn't stung anything or extended it's sweepers for all I know or have seen. I do observe my reef at night via moonlights.
Good Luck
Greg