my 2 lovely snake-sharks, designed by the lovely - ThisSoul - on DA. their initial design sheet can be found here http://thissoul.deviantart.com/art/Snake-shark-adoptables-2-477341492 along with other designs for sale (at a very reasonable price of 15 DA points)

snake-sharks are a closed species designed and owned by the lovely ThisSoul if you want one you must either buy one from her or get her permission to design your own