This is an urchin, its a pet of some friends I visited.
The orange eye looking thing is actualy its butthole, and it also functions as an air sac so it can breath whenever. It comes to the surface and eats air to refill it. Its mouth is underneath, and the pointy parts are like poison. It moves very slow, like a snail, but with noodly arms with cups on the ends. I got to see it poop little rocks like the size of sand .