A Kurdish Dove from Noah's Ark

So old Noah's having a wander one day, when there's suddenly a flash of
lightning, a rumble of thunder, and the voice of the Lord comes echoing
out of the heavens.

"Noah, my old mate", says the voice, "You remember a while back I got
you to build a ship for me?"

"Yes, I remember it well", says Noah, "Two decks, and space for two of
all the animal species on earth."

"Well this time, I want you to go one better, and I want five decks -
and I want you to fill it full of freshwater fish."

"Fish?" asks Noah, "But why, Lord?"

"Well", says the Lord, "I always fancied the idea of a multi-storey
Carp Ark."

(I'll get me coat)