Aqueous creatures are native denizens of the Elemental Planes of Water, and they move with a unique grace underwater. This template can be applied only to a nonoutsider that has none of the following subtypes: air, cold, earth, fire, or water. An aqueous creature's CR increases by 1 only if the base creature has 5 or more HD.

Rebuild Rules: Type gains the water subtype; Senses gains darkvision 60 ft.; Defensive Abilities gains DR and resistance to cold as noted on the table below; Speed gains a swim speed equal to its highest speed + 10 ft.; Attacks gains bonus cold damage as noted on the table below on attacks with natural weapons and metal weapons.