Found these guys on new live rock

[Hokielooker]

Can someone tell what they may be? Thanks in advance.

 

[sam2110]

Photo isn't very good but it looks a bit like a blasto! I am probably wrong though

 

[fragglerocks]

might be a strawberry nem, could be a ball too

 

[fragglerocks]

does it have a hard base, or it just soft tissue?

 

[Hokielooker]

does it have a hard base, or it just soft tissue?

Base looks soft and the top is definitely soft as it moves in the flow. Here are two pics with the white lights on.