To help me answer your question, please tell me:
* What kind of fish are you interested in? (e.g., tuna, salmon, cod)
* What do you mean by "large"? Are you asking about:
* The size of the fish?
* The quantity of fish produced?
* The size of the company or organization that produces the fish?
* Something else entirely?
Once you give me more details, I can give you a more accurate and helpful answer.