I just recently (about a month ago) bought a CI Skinny Fish. While bringing it to the beach one day I noticed these lines on the bottom of the board in between the rail and stringer (not touching either) which I have never seen on any of my previous boards I owned. This was after riding it just a few times. There are a couple of very small dings in the middle of them, which I am not sure how they occurred. Anyway when running your hand over the lines they seems to be no crack in the glass letting water in but I just dont know why they appeared and if it is something I should worry about, have fixed, or can fix myself. I got to admit i never expected this from a Channel Islands board as my other, less expensive boards, never had this problem.