Monty Python's Flying Circus, Series 2

Mr. Last:
You've got a pet halibut?

Mr. Praline:
Yes. I chose him out of a thousand. I didn't like the others; they were all too flat.

Mr. Last:
You're a loony!

Mr. Praline:
I AM NOT A LOONY! Why should I be tarred with the epithet "loony" merely because I have a pet halibut? I've heard tell that Sir Gerald Nabarro has a pet prawn called Simon, and you wouldn't call Sir Gerald a loony, would you? Furthermore, Dawn Pelforth, the lady show jumper, had a clam called Sir Stefford after the late Chancellor, Allen Bullock has two pikes, both called Norman, and the late, great Marcel Proust had a haddock! If you're calling the author of À la recherche du temps perdu a loony, I shall have to ask you to step outside!