Board Thread:General Discussion/@comment-28135006-20170505061835

ESO isn't cannon so technically lore wise they never have been seen, and all written mention of them is contradictory, some detailing them as mermaids and others as white elves like in ESO

Zenimax made the game, not bethesda. They might have piggy backed on the lore, but it still doesn't count as the elder scrolls 6, so exists outside the main timeline, unless someone wants to put a 'lil dragon break in there. 