The patch of tentacles on the center left, hanging down? Looks a little like glass anemones. A nice way of describing aiptasia anemones. No bueno! The white balls in the middle, if they are the tips of the tentacles you're seeing, could be a patch of what I used to call ball anemones. They are actually Pseudocorynactis anemones (if that's what you are seeing). They have semi-transparent tentacles that end in little balls. They grow in patches and aren't usually much larger across than a dime. They may be pink-ish or orange-ish in color.Are those the tentacles? Or am I missing what you are seeing? I see a lot of tube worms like Chris pointed out.
