Neville blinked at the whole thing. He was both interested and horrified that something lived in something else's bum. "That is...," he paused, then stopped and moved along another train of thought. "It breathes out of it's bum?" That was interesting, yes, but he wasn't even sure how it was possible for something to breath out of it's anus, honestly. "It is interesting," he said after a moment. "I had no idea it was possible, but it's definitely interesting."
The question had Neville thinking and finally he shrugged a little. "I don't know," he admitted. "I'd never really thought about it. There are so many that it's hard to pick just one. Squids are interesting, though, I have to admit that. And the octopus is kind of neat."