G'Day! I'm looking for a good knife for salt water usage. My surf spot has become alarmingly overrun with kelp.I'm afraid of my leash (from my surfboard) getting caught in it and creating a bad situation. I am also taking into consideration it coming with a good sheath that can attach securely to a leg strap.I wear a bathing suit not board-shorts so I am limited to how I can carry this while surfing. I am partial to Benchmade knives,and I am aware that they have dive knives. But I'm willing to branch out of my Benchmade bubble if the right knife comes along.