leather coral id

I just bought this green gonipora today. It has been dipped and put in the tank for a couple hours now but it won’t seem to open up and I’m not sure. It had opened up just about a quarter inch before and then I moved it and moved it back to the original spot and it still hasn’t opened. All the...

So I was just gifted two small, what I believe to be, devils hand leather corals. Are these the ones that give off chemicals that stunt the growth of other corals? Forgive my ignorance but leathers, outside of toadstools, are foreign to me.

Hi - can I please get an ID on these three corals?