Fennecs kind of look like the "little grey/green aliens" of the fox world.

They're smaller than your "normal" red foxes, have exaggerated looking facial features with giant mostly black looking eyes with a bit of a slanted look to them but smaller looking noses, and come from a warmer, more barren climate that better resembles a place like mars than the stereotypical habitat of the red fox does, at least on a surface level.