- And speaking of danger... what's a shark doing in a freshwater lake?
- Shark, shark!

— Boo Boo Bear, Ranger Smith (Don Messick)

10 seconds sound clip from The Yogi Bear Show - The Stout Trout (1958) - S01E11 TV Series.

You can hear this line at 00:02:19 in the Blu-ray version of the movie.

Quote context

[...]

- The speedy bear is so quick that he can catch a fish with his bare paws.

- Of course, the cagey bear is not above using the finest fishing equipment, including the very latest in lures.

- But even the cleverest fisherman can't always be sure what a fish might bite at.

- The fisherman's favorite lure is the fly. Preferably dead.

- Even fly-fishing is fraught with dangers.

- And speaking of danger... what's a shark doing in a freshwater lake?

- Shark, shark!

- Well! It's Wily Wily, the Wily Trout.

- Which proves that even trouts have a sense of humor.

- A good fisherman keeps cool, calm, and collected. Well, cool and calm... at least calm. Oh, well..

- Temper, temper. Tantrums will get you nowhere with a trout. Especially, a trout with a clout. Look out!

[...]