From publisher blurb:
Remarkable Races is going beneath the waves in a new series called "Remarkable Races Submerged." These new racial supplements will add an aquatic flair to our beloved Remarkable Races line, transforming many of your favorite races for use with the Cerulean Seas Campaign Setting, as well as introducing a few new ones.
Ever wonder what motivates the authors of Cerulean Seas? Well perhaps it's the enthralling morgen! Based on the Muse from Remarkable Races, we explore a congenial citizen from the Sea of Dreams who can coax any aquatic adventuring party to new levels of adventure. A vision come to life, these striking and peaceful pseudo-merfolk remove your fears, and draw you closer to your desires.