I bought a fragment of hammerhead coral. It seems to have sunk into itself, is it going to die?
Did you acclimate it before you put it in your tank? Perhaps it's just stressed.
I bought a small fragment of this(about the size of my pinkey finger) Does the colony mature into something like this pic?
Euphyllia Corals are nearly bulletproof. Give it some time and it'll begin expanding eventually. Been thinking about Fragging all 3 of mine they're getting pretty huge.