Sheerness cooling pond

[Dewey Cox]

So, the other day, the kids were melting down, so we stopped at prairie oasis to let them out for a bit
Anyway, there's a sign that says fishing in the cooling pond is prohibited.
Is there fish in there? And if there is, why is it prohibited? And if there's not, why prohibit fishing?
They should stock something tropical in there. Snakeheads or something.