As a full-round action once per day, a water orm can dissolve into water, appearing only as a long, dark, serpentine stretch of water that looks similar to the passage of a school of fish when viewed from above the water. While in this form, the water orm swims at a speed of 600 feet per round (60 mph) and gains a +40 bonus on all Swim checks. It cannot attack or take any action other than swimming in this form, and can remain in this form for up to 8 hours at a time. A water orm can revert to its solid form from this state as a free action. Water orms are unable to pass into or through salt water when using this ability.