Originally Posted by Sarcothelia
It is a Euphyllia of some type.
Do not put it in strong flow or it will develop long, powerful sweeper tentacles.
Sweepers are a corals form of defense, it has absolutely nothing to do with flow. When these corals (Euphyllia and most LPS
) sense other corals in the tank it will send out these sweepers trying to kill them.
And for the OP the reason Goniporas are challenging is not that they are hard to keep, just that wild caught specimens just don't do well in the home aquarium for whatever reason