Once thought to be mythical, the Merethae, or ‘Merfolk’ as they are colloquially termed, are a sapient people native to the oceans of Pannotia, with populations also inhabiting major inland seas and large freshwater lakes across the known world. Known for their extraordinary diversity in form, culture and physiology, the Merethae are a highly adaptable people whose societies range from nomadic pelagic clans, to complex, sedentary civilizations anchored around reefs, trenches, and lacustrine basins. While often grouped together under a single name, the Merethae are an incredibly complex people that encompass numerous distinct forms, each shaped by their local environments, resulting in a wide variation in appearances. Their versatile and long history of interaction with the oceans of Pannotia and its deep-seas have made them the single most influential non-landbound peoples in Pannotia’s historical records. As of the current era, six Merethae subgroups have been identified: Thamereth, Lumereth, Kelmereth, Vormereth, Samereth, and Nermereth.