And now is probably not the time to point out that another term for enantiomorph is enantiomer. Which is completely ridiculous. There were no mer involved in Tiber's apotheosis.
Still, Vehk was one... and his Chimeri friends.
and if anything, might be a nice out-of-universe explanation of where the word "Mer" actually comes from. In "generic fantasy art" they only use "Mer" to refer to mermaids and suchlike, which keeps getting me false positives for TES fanart...