Does Aquaman swim or does he 'fly' through water?

He does both, and more. Underwater, he is in absolute control of the environment. It's really hard to say, from the single frames in comic books, if he's swimming or flying, but from the superhuman speeds he moves in water, I'd say he propels himself the way a torpedo does. But sometimes there seems to a swimming motion in his legs as well. read more

Superman. Aquaman doesn't move through the water by any magical means, but his own physical power. Aquaman moves as fast as he does because of his strength, and he swims, as opposed to doing anything else, because that's the only option he has. read more