I converted my old character Adagio into a dragonsona since all my friends are doing it. >__>;

Just like the old Adagio I imagine they live in some sort of lagoon, are mostly nocturnal, and spend their nights flying over the open seas.

I once read somewhere that people used to mistake comets for dragons, and that's why in a lot of old paintings they are depicted with fiery tails.
I'm sure seeing Adagio's light fly across sky is seen as a good omen to weary seamen.