Shadow
Probably one of the most largest breed of dragon. They can turn into shadows,and roam around the darkness. Sadly, in their shadow form,they can't fight or pull other dragons under with them. Shadow dragons are one of the most darkest colored breeds that range from dark grey to black. Shadow dragons hate light if you can guess, this breed normally roams during the night, when everything is dark. When it comes to spying on the grounders or flyers, these dragons are useful to have!
Fire
This breed of dragon is medium to large in size with bright colors like red,orange,yellow,anything fire like. But there are some rare colors do this dragon. A fire dragon can be completely black with red,orange,or yellow markings, but that's mostly it. Fire Dragons as you should think are weak to water, which is correct. If fire dragons get wet for more than five minutes, they could burn out all of their flame and never be able to battle again. Without their flame, they are totally useless and not to mention, can probably die.
Water
Water dragons are also medium to large in size just like the Fire Dragon. Their colors are normally green,blue, or grey. Or so I have seen. I've also witnessed a water dragon completely black,with some blue markings. Though, their weakness is probably lighting hitting them. Lighting is attracted to water like most people say, so if they get hit by any sort of lighting, they could be paralyzed.
Grass/Earth
Sadly, these dragons aren't very large in size but that gives them quite the advantage to. Being a small to medium breed is actually a big advantage to speed. But yet, they should probably watch out just so they don't get crushed by some of the much larger dragons, like Shadow for example. A Shadow Dragon could step on them if they weren't watching out were they wee going. Another weakness a Grass/Earth dragon has is fire, fire can burn things like them so that makes them a major target for grass. Their colors are normally green with brown markings.
Poison
Poison Dragons are also a small to medium breed. They can also easily get stepped on by others unless they move out of the way just in time. These dragons are a bit slow compared unlike the grass/earth dragons, but they're still fast little dragons. Their weakness is actually Grass/Earth also and their colors are usually purple,or pink, with black markings