Argonians are capable of breathing underwater through their gills. They can also smell with their tongue and covertly curse at you with their tails.

Joke and fake loading screens and screenshots from The Elder Scrolls IV: Oblivion, run by @ChrisOfTheDead.
General links and the actual Oblivion mod made from these jokes in my Carrd page:
Argonians are capable of breathing underwater through their gills. They can also smell with their tongue and covertly curse at you with their tails.