User blog comment:D2r/Unanswered Questions of Redwall/@comment-4507006-20111126035043/@comment-1399757-20111126201238

A small pond without an outlet/inlet would most certainly be void of fish because of the high amount of salt that would build up in it and be lethal for most life. Even if you put that fact aside, you would have to fish at very precise times in order to keep the population balanced. Too few fish will mean dying out because of a lack of mating fish, and too many fish will also mean depletion of food resources which quickly leads to death as well. When fish are spawned there are quite a lot of them in one spawning - thus it would be fairly impossible to keep the pond's ecosystem balanced. If my logic is faulty someone please correct me.