The smaller circles r about the size of a pin head and the larger ones centered are a little smaller than a dime. Looks like red "plumage" (feathery) when they extend out.
The structure looks like it could be a cyphastrea...but yea...not much left. Personally I wouldn't toss it just yet, as I've seen stuff that looked completely dead come back...but chances are it's pretty much gone.
There's about 10 red polyps that come out and it's expanded some along the rock, just not coloring out yet. Think it was covered by other corals for a while before I got it.