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.
We will start the line with the Sunken Relluk. Ever wanted to play a man-sized wooden tiki mask, propelled by water jets, and bejeweled with glowing gemstones? Now is your chance!
This book expands on the material presented in the Cerulean Seas Campaign Setting, bringing you a new PC race for aquatic adventure!