Sebae Anemone wont attach

[JasonZ219]

I have a Sebae that I introduced to my tank just about a week ago, its eating fine and seems to be okay but for some reason it wont attach to anything and the clowns dont really take any notice to it. I did notice the clowns had these little black spots on them after he was introduced which someone told me could be sting marks from attempting to host the anemone, I am new to all this so please bare with me.

Thanks in advance!

 

[NYCBOB]

Sabae likes it on the sandbed. Did u try digging a hole and put it there?

 

[geckoejon]

pic of nem?

description of the system?

 

[garygb]

Sebae can refer to Heteractis crispa or heteractis malu. Malu likes sand, crispa likes to attach in a hole or cave in the live rock. Pics?