My leather coral

This is what my 2 clowns having fun on this days what i can do ? My toadstool is in danger now? Im new in saltwater tanks us to be like the las pic

 

A leather hosting clowns is pretty common. Usually it's not an issue for the coral. It might be a rare occurrence when the clowns or too large or too passionate regarding residing in the coral, the coral then becomes stressed with all the activity and will no longer open. Basically for now I would not be concerned.

 

They will eventually stress and kill the leather unfortunately ime.

 

I think this is pretty common. Maybe stress it out like mentioned but maybe not. Just keep an eye on it. Not much you can do other than remove the leather

What kind of clowns are these?

 

True percula

 

Get them an anemone. Then they will leave your leather alone. Possibly of course

 

My tank is only 3 month old

 

I would hold off on a nem for a while until your tank is more established.

 

+1 some people say nem kill corals too

 

Clowns are funny things and will usually live in anything, even non-organic anythings lol.
The toadstool might adjust or it might get stressed further. Just monitor it to make sure the polyps still extend.
If it's stressed and no longer extending, you can move it to another spot and the clowns will get confused, but might eventually find it again.