Look, I'm sure he is. But you have a large class and he can get lost, you know, from sight if you're not looking. I'm not saying you're not looking...
8 seconds sound clip from the Finding Nemo movie soundboard.
You can hear this line at 00:13:58 in the Blu-ray version of the movie.
Quote context
[...]
- There's... Nothing to see. Gather, uh, over there.
- Excuse me? Is there anything I can do? I am a scientist, sir. Is there any problem?
- You know, I'm sorry. I didn't mean to interrupt things.
- Well, I can assure you, he's quite safe with me.
- Oh, my gosh! Nemo's swimming out to sea.
- Nemo! What do you think you're doing?
- You're gonna get stuck out there and I'm gonna have to get you before another fish does.
- Get back here. I said get back here now!
- Stop. You take one more move, mister...
[...]