Water Genasi hail from the Plane of Water. Marids (Water Genies), and Water Elementals, are the two most common sources for Water Genasi. Most Water Genasi on Faerûn are born in the regions around the Sea of Fallen Stars.

Water Genasi are generally calm, level headed, and have a tendency to "go with the flow". They're somewhat stoic, and easy going, like the waters that they represent. Like those waters though, they're capable of being whipped into a frenzy if they get disturbed enough. These occasions are rare, but something to be feared. Water Genasi tend towards the Lawful end of the Law/Chaos spectrum, and their contemplative, thoughtful nature makes them excellent Clerics and Monks. Their language, Aquan, varies between babbling brooks and waterfall torrents, depending on the words and meanings conveyed.

The ability to breathe underwater, blue or green skin, hair, and eyes, webbed fingers and toes, vestigial gill slits, and clammy skin are some of the factors that manifest themselves in Water Genasi.