The Seafolk

The Seafolk is the broad name for multiple aquatic races of both Fey and elemental origin encountered in and adjacent to the Feywild and are the subject of a large body of folklore, particularly in coastal areas or regions with large bodies of water. In folklore these "breeds" have many names and subgroups such as the Nixie, Nereids, Tritons, Mermaids, Sirine among others.

The Half Elf Castaway of Saltmarsh claims to have been found by these beings as a child and raised to adulthood among them.

In addition, the mysterious and ancient Standing Stones located on a small island off the coast of the Alexian Fishing town of Saltmarsh is also seemingly the site where an ancient binding ritual and sacrifice were performed on one of these beings, trapping their spirit in the two standing stones.

As a result of this ritual the "Sirine's song" emanates from the stones. Rumors persist that it is sometimes an entrance to the mysterious Feywild, so the island itself is shunned and avoided by Saltmarshers. It is also, according to legend, the reason for why the waters near and around Saltmarsh are teeming with fish. Thus, locals are very protective of it despite its ominous nature.