It's a fantasy role-playing game.

DM: You are Keyleth, a half-elf druid . You are the member of the famous group of adventurers. Previously, She goes to tell Captain Adella, but finds that the dark spot has disappeared when she looks again. Adella nonetheless prepares for battle as a precaution.
DM: 14. It doesn't take much for you to realize that this fog is pretty localized. It's not an entire bank that covers the entirety of the ocean in actuance. You kind of travel from one side of the boat to the other to get the scope of it. It's pretty narrow and pretty focused in its direction.
Player: Does this look like something that I would have? Like, is this another druid doing a fog cloud spell?
DM: You recognize this to be of similar size although magnified.
Player: Bigger than us?
DM: A little--
Player: Than my spell. Bigger than my spell?
DM: Bigger than the usual spell that you are used to casting but it does appear localized enough to be of a similar-type spell or effect.
