Merfolk

Water-based humanoids that are nearly incapable of movement on land due to having no legs. But are the most adept of the many intelligent beings when it comes to movement within the great oceans of the World of Ærnth (and Sójaskar). Not normally considered a playable race within any of the d20 systems, and not recommended (but still possible, for sea-based adventures/campaigns) as characters using the Rolemaster system.