Original names: Water Hazard, Atomix
Fanames: Hydro Pumper, Gigaton

Obs: My version of the omnitrix recognizes her animal DNA and make her aliens look like animals too, like cats for example. This is important to tell.

Some of them are hard to find an animal to "mime", but that's bcus plenty of aliens look like earth animals, have animal characteristics or are machines.
Water Hazard is visually described as a humanoid crustacean with barnacles on its body (where I imagine it's from he absorbs oxygen and converts it into water jets).
Now Atomix is a mystery, as far as I'm aware. Some believe him and NRG are from the same species, some believe they are very different.

Water Hazard was hard for me adapt, since his head is so small. I decided to make it bigger and use blue for the eyes and barnacles, like it was a color glitch of omnitrix.
Atomix was harder cus he's very robust. I redrawn it, so this one in the image is the version 2 of it.