Riparium
Located off the coast of Sapience, east of Delos, Riparium is the underwater kingdom of the mermen. Populated by a variety of merfolk, underwater creatures, and a very dangerous giant Kraken, the area is generally intended for the same crowd that frequents the Rock. As the area is underwater, you must be sure you have some prickly pear to eat, else you will quickly drown.
Little is currently known of the politics of the merfolk, save that they seem to ally themselves generally with good.