Like all nagas, Aquatic Nagas have long, snake-like bodies covered with glistening scales and more or less human heads and faces. Their skin color ranges from an almost metallic blue through turquoise to emerald green, patterned in a reticulated fashion. They are the smallest nagas, being around 10 feet in length and weighing around 200 pounds.

In combat, aquatic nagas usually stay mostly concealed in a body of water from where they launch a spell attack, but in close combat they will not hesitate to use their deadly venomous bite (if bitten, save vs. Poison or die). However, they are not naturally aggressive and will often parley with characters. Each has the spell-casting abilities of a 5th level Magic-user.