Take image 1 and 4(out of 8 total) and blur the circular line that forms the body. 5 and 8 are the right level of blurriness(perhaps a bit to much) but they miss the "gas" that makes 1 and 4 (and 6-7) pop.

Not sure what software you are using, but a displacement map applied from a cloud/solid noise layer might also make it appear that the surface is constantly shifting via flares.