Water orms are rarely discovered except by their own choice. As a full-round action while in water, a water orm can move up to its run speed (200 ft.) without leaving any trace of its passage (identical in effect to pass without trace). An elusive water orm gains a +40 circumstance bonus to its Stealth check. In addition, when not in combat, a water orm is considered to be under the effects of a nondetection spell. These effects function at caster level 20th and cannot be dispelled.