looks to me like a Purple Sinularia. This is my colony of a Purple Sinularia in my 4’ tank with a filter. Without a filter it looks exactly like yours.
I believe that it’s scientific name is Sinularia mollis however I could be wrong as Sinularia is a huge genus with many that just go under numbers.
A white light photo will work best, a filter on top of that works a lot as well. For example, this is the exact same coral as seen above but without a filter. As I said, it does look very similar to yours.