Uh... Big and blue?
4 seconds sound clip from the Finding Nemo movie soundboard.
You can hear this line at 00:27:28 in the Blu-ray version of the movie.
Quote context
[...]
- Ah, the ocean. The ocean! Aagghh!
- He hasn't been decontaminated yet. Jacques! Clean him!
- Ocean.
- Wow. The big blue. What's it like?
- Kid, If there's anything you need, just ask your Auntie Deb. That's me.
- Or, if I'm not around you can always talk to my sister, Flo. Hi. How are you?
- Don't listen to anything my sister says. She's nuts.
[...]