User blog comment:D2r/Unanswered Questions of Redwall/@comment-1031927-20100716211740

8. How does the Redwall Pond still have fish, if there's no river to feed it? Shouldn't such a small body of water been fished to extinction years ago?

It does link to the River Moss- remember, it is what's left of the flood tunnels used against Kotir. And the Redwallers would be careful not to over-fish it- they're bigger treehuggers than we are, after all.