Peridot? [That's an interesting name for person. Maybe they fancied geology like Fishlegs. However, he doesn't muse on that for very long, especially after his second statement.]

W-wait a second. You were turned into mermaids-- merpeople?! These worlds are able to do that?!

[Hiccup blinks furiously, rubbing his head as he stares ahead of himself. Was the world suddenly spinning...]

This has to be some crazy dream. First my dragon's taken away, and now there's talk of turning into merpeople. Oh Thor...