Every flick of a fin creates movement. So, first we'll start with the caudal fin. No, no, boy. Your tail, tail.
12 seconds sound clip from the The Sword in the Stone (1963) movie soundboard.
You can hear this line at 00:30:18.080 in the Blu-ray version of the movie.
Quote context
[...]
- Well, I am a fish, aren't I?
- You merely look like a fish. That doesn't mean you can swim like one. You don't have the instinct.
- So, you'll have to use your brain for a change.
- You are living between two planes now, somewhere between the ceiling and the floor.
- Now, there are lots of ups and downs, like a helicopter.
- Yes. It... Oh. No, never mind.
- Now, that gives you the forward thrust. Now, come on, let's get a rhythm.
- In and out, thin and stout, that's what makes the world go round.
- For every up there is a down, for every square...
- Yes!
- Yeah.
[...]