Neptunian Slug

Neptunian Slugs are edible, slug-like organisms apparently native to planet Neptune. There are two known varieties: the yellow one, which is a key ingredient in Neptunian cuisine; and the purple one, which is known to cause terrible diarrhea, but is sold in food markets anyway.

Biology
Normally medium-sized, the Neptunian Slug can inflate to enormous size as a defense mechanism in order to avoid being cooked. These creatures have a striped body, two eyestalks and sharp teeth in their mouths. Like Earth's slugs, they are deflated by salt.

Cultural significance
Besides their culinary uses, Neptunian Slugs can also be found in pet shops, indicating that they may be domesticated and kept as pets.