Some Sylvaneth dwell not upon the land but in the water, tending and guarding the forests of kelp and the creatures and spirits that dwell in the seas and coeans.
Naereids: They are akin to the Forest Folk and they tend kelp forests in the shallows. They are large creatures with fronds, membranes and wave-wings that allow them to speed through the water far more effectively than land dwellers. On land they are swift and deadily, once they have adapted to the lack of water resistance
- Kelara: The leader of the Naereids in the Sea of Serpents, she aided Alarielle in her flight across the frozen sea at the beginning of the Age of Sigmar.
- Usniel, the Lord of the Deeps and guardian of the great serpents, whose own tails reach into the very roots of the Realm of Ghyran