I agree with you username. If there aren't any now, there will be one day, even if I have to become a geneticist and splice the Gene's of a bat, a lizard, a snake, and a bombardier beetle to make sure it happens!!
Oof, me and a friend talked about this..... I have a bunch of theories, instead of bombardier beetle for fire, you could use an archerfish for squirting water and gills for a sea dragon, an electric eel and feathered wings for a storm dragon, a spitting cobra for a poison dragon, the list goes ooooooooOOOOOONN--