Blue Is The Water (that beckons, that buries)
Jonathan Sims is a merperson who has always lived below the waves. One day, however, he steals away and ventures to the surface in search of someone he lost. On newfound legs, his search takes him to The Magnus Institute — the foremost academic institution researching crypto-zoology and crypto-marine biology, headed by the enigmatic Elias Bouchard. With his new position as Head Archivist, Jon is in the perfect place to continue his search. Hiding his secret identity as merfolk should no problem, either.
After all, it's not like he wants to be friends, much less more-than-friends with the humans.
And surely none of them are hiding secrets of their own.
Right?
...
In other words: It's a selkie and merfolk AU! Jon is merfolk, and goes to the surface in search of a long-lost friend. He takes a job at the Magnus Institute as part of his search, and soon finds himself embroiled in all kinds of drama — including, but not limited to, falling in love.
Updates Weekends.