They never been drawn like this before

If they have, I'd be surprised. Nudibranchs are not an animal very well known to the general populace. Optimus and Megatron have the shapes of real nudibranchs. At first I was going to try to find nudis that would match their color schemes, but that would have taken too long for the time being. So they just have their colors with nudibranch shapes I felt matched them to some degree. If you have the time, I recommend looking up the Chromodoris and the Dendrodoris, they're both very pretty animals. The picture is something I'm going to come back to after January is over though, there's a panoramic in my head that I'd like to finish.

*pokes image* You know, I posted you at the bunny farm so you'd leave me alone, not so you could continue to bother me.

( Just imagine little creep-creep sounds. )

Apparently I didn't succeed in defeating the sandman. I have now spent the week without sleep every other night.