I realized two things:
First off, I draw a lot of water-dwelling dragons with large dorsal fins. Like sailfish-level fins, and I’m not sure why, aside from the fact that it’s a pretty obvious indicator that the dragon is fishlike, and as such, probably lives in the water.
The second thing is that I’ve probably been under-utilizing my “aquatic” tag, but I’m a bit too lazy to fix that, really.