The book has detailed information and descriptions on various types of both realistic and fantastical watery environments, including
underwater, the open ocean,
ships,
coral reefs,
grottos,
swamps and such. Watery hazards such as waves, storms, exposure, rain and the like are deeply explored. Several new sea-affiliated races, the
darfellan, the aventi are introduced. Old races, such as the hadozee (a
yazarian-like race from the
Spelljammer setting) and
Sea elves are detailed for use as
player characters. There are new prestige classes, new magic items, new spells, new monsters, and various other rules additions. Finally, a few pre-made adventures are included at the end, set in aquatic/coastal environments, for players to test the new content on. ==Publication history==