I have done some searches on the web, and the very biggest crawfish seem to come from Australia - where they are called "YABBIES".

They are the size of a large Gulf Shrimp or a freshwater lobster, and the thought has been intrigueing me ever since I tried the etouffe at a Loisianna restaraunt near my house in TN, USA.

Among other thoughts - if you were going to make a pizza with crawdads (yabbies) what kind of a topping would go well with it.

The other thought was - where do very large crawfish live in the world besides Australia? Are there particularly big ones in South America for one thing?

Why are they noted for size only in Aus?

Why do they get so large?

Are they importable?