Did you mean Hynophora? If you did, they will literally kill ANYTHING that it's tentacles will touch. Keep well away from anything that you don't want killed.
I'd love for my little frag to take care of my Yellow Polyps, but I've got other corals too near them to target kill them.
There are even species of Hydnophora that send out a mucous that will kill and eat anything it touches, could be anywhere from inches to a foot.
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It all started with ............. "Finding Nemo"
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