It coming out of the hole further. The new area I can see is blue and furry or maybe feathery?? Can't really tell. I made a quick movement after I snapped the pic and it went back in the hole.
Is it 2 feathery appendages? Looks like a type of feather duster. I used to see corals with lots of different colored dusters for sale as "Christmas tree rock/coral". Tis' the season.