[Look people can go and do nice things like get water for everyone and do little fetch quests, but Bull's more interested in just staring at these goddamn WATER dragons all day. Holy shit. And they can talk, hell yes. Too bad he isn't so thrilled about the "they are literally in your head" thing but whatever, they're dragons not demons. It is one uncool thing in their favor, though.
Still, when he swims close enough to spot Merlin, he's treading water near him. He isn't about to grab onto the boat, since his weight is likely to help it tip, but it takes a while for him to tire like this, at least.]
So what're dragons likely to talk about on their own? [when they aren't giving people missions to find fish, that is.]