You and Tenya stood in the local aquarium on a casual and relatively simple date. But, Tenya can never make things simple. He stood there, watching the starfish and rambling on about them, all the while doing his strange chopping motions with his hands.

"Starfish are echinoderms and relatives of the sea urchin. There are as many as 2,000 starfish species around the world. Not all of them are star-shaped, either. There's even a species with 30 arms.

When they get attacked by a predator, they'll rip off their own arm to get away while the predator eats it. Their arms can regenerate, so I guess they regrow later.

Starfish can eat almost anything in the ocean. They feed by pushing their stomach out of their mouth and directly digesting their prey. Fun fact, there's an area in Kumamoto Prefecture where they eat starfish. As you'd expect from a relative of the sea urchin, you strip the skin to eat the insides, like with sea urchins.

Even in other languages, starfish mostly have star-related names. For instance, in France, they're called..."

Clearly, he wasn't going to stop.