I have no idea what else could have been dumped there. The only things that don't belong there are the Koi and the pacu...the rest are usually found on long island. But I highly doubt this pond is better than much, I wanna do some noodleing and pull up a huge flathead catfish ;-) lol but I love it the fish are all so happy and healthy looking and I was shocked this pacu is surviving through winters but it has been there for at least 4 years that I know of. It was most likely someone dumped it when they took there tank down and couldn't find homes for their fish...and the Koi probaby outgrew someone's tank or pond same story I'm guessing. And I will post more pics as soon as I can get some more good ones but I'm not a dude...I'm a dudette my name is Jacki ;-)