What did they REALLY look like??

So i was always wondering what the aliens looked like in their original alien forms.

This is the info i can remember:

-They are purple, and tube shaped

-They possibly have heads, tongues, and a back (when they first came to the planet, dick said "Can anyone swivel their head around? Then how do you lick your back??" This could possibly be from another form they previously used though)

Tommy is the oldest, which possibly means he is the biggest and/or tallest of the gang (Dick pointed out that he was bigger on earth even though tommy was older, hinting that age=size in their race)

They likely do not have blood and are not accustomed to life-forms that do (sally fainted when she first saw blood, as even though she had inflicted thousands of wounds worse than the small, bleeding cut, she had never done so on a life-form that bleeds)

They are really, really small (their entire spaceship could fit in dick's human "pants," though i think he meant pocket)

Their eyelids are transparent (harry thought he went blind when his eyelids were closed, and found they were manual, this might mean that they possibly dont even have eyelids, or that their eyes work entirely different)



So does anyone have any other quotes or descriptions of the gang's alien forms that they remember from the show that i missed?? I'd love to have basically all the hints they gave sooner or later lol.

Here are the ONLY TWO pictures of what people think the aliens from 3rd rock from the sun look like on the entire web. I couldnt find any other pictures, ANYWHERE lol. The first one is pretty good, the second one is kinda meh, the second one was the only one around for years lol.

http://fc09.deviantart.net/fs70/f/2014/049/d/b/thirdrockaliens_by_fabl epaint-d772p7l.jpg

http://fc09.deviantart.net/fs38/f/2008/318/9/6/3rd_Rock_From_the_Sun_b y_Dragon_Wing_Z.jpg