Who said "Fish gotta swim, it's what we do!"?

This quote is attributed to Dory.

Fish gotta swim, it's what we do! - Dory

"Fish gotta swim, it's what we do!"

Dory Nature

"Just keep swimming, just keep swimming, what do we do? We swim, swim, swim!"

"I suffer from short-term memory loss."

"When life gets you down, you know what you gotta do? Just keep swimming."

"I'm sorry, what were we talking about?"

"Nature teaches us about beauty."

"Nature teaches us patience and wisdom"

"Sometimes it snows in April."

"Every town has a soul, and Twin Peaks has a troubled one."