Riparium - Achaea Online Help

12.13.2 Riparium

Located off the coast of Sapience, east of Delos, Riparium is the underwater
kingdom of the mermen. Populated by a variety of merfolk and underwater 
creatures, including the dangerous giant kraken, the entire area is underwater. 
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.