Who said "We shouldn't be doing this."?

This quote is attributed to Flounder.

We shouldn't be doing this. - Flounder

"We shouldn't be doing this."

Flounder

"I'm scared, Ariel!"

"Don't you think you're being just a little bit too reckless?"

"I can't do this. I'm too young to die!"

"You really shouldn't have done that."