Hey thanks! Ya it must be some sort of mucous net for protection or stability as its beginning to grow a straight b-line away from the rock. Just curious and could not locate much information about it so I thought I would create some for anyone else who comes across this.nice pictures, either eggs, or a mucus net to protect itself. I don't know if there are any sponges that look like that.
Could be eggs from a snail, difficult to say.