Maormer, also known as Sea Elves or Tropical Elves (or derogatorily as Fish Elves), are a race of Mer that reside on the island kingdom of Pyandonea, far south of the Summerset Isles.
For more information, see the main lore article.
Maormer can be encountered on Khenarthi's Roost as well as in Hew's Bane, Auridon, Greenshade and Summerset.
A list of all Maormer encountered in ESO can be found here.
Summerset Maormer appearance