Board Thread:General Discussion/@comment-11169242-20130907142333/@comment-24770490-20140812173619

Mattwo wrote: Osmosians never really existed in the first place, it was just Kevin Devin and Aggregor before the retcon.

I'd also like to point out the issue of the half-human siblings who were half two different species, you can't explain that by simply saying they were the offspring of a human and one alien.

They are actually adopted sisters according to Dwayne. I don't remember they mentioned that in the show.