You mean you can turn yourself into a fish?
2 seconds sound clip from the The Sword in the Stone (1963) movie soundboard.
You can hear this line at 00:27:41.080 in the Blu-ray version of the movie.
Quote context
[...]
- Oh, I plan to cheat, of course. Use magic. Every last trick in the trade if I have to.
- Oh, no.
- You see, I'm an orphan and a knight must be of proper birth.
- I only hope I'm worthy to be Kay's squire. That's a big job too, you know.
- Oh, indeed. Yes, yes. I would say almost impossible. Yes.
- Well, now then, when I said I could swim like a fish, I really meant as a fish.
- You mean you can turn yourself into a fish?
- After all, I happen to be a wizard.
- Could you turn me into a fish?
- Do you have any imagination? Can you imagine yourself as a fish?
- Oh, that's easy. I've done that lots of times.
[...]