Search: soft shell turtle
Why: Jason posted this video of a soft shell turtle on a Roomba. It looks like it has webbed feet, aka needs to be in water.
Answer: In water!
In nature, most soft-shelled turtles reside in bodies of water with soft mud or sandy bottoms where they bury themselves and away passing prey.Source: Chelonia.org
The More You Know: Soft-shell turtles are so-called because their carapace doesn't have horny scutes (scales), but instead is leathery and pliable. Varieties live in Africa, Asia, and Southeast Asia, and some were recently discovered in North America!! They can be kept as pets, but they require a ton of equipment. And they are weird looking.