It is an outdoor pond, i probably wouldn't see them a ton but i have had speckled trout in it previously, as well as a large number of unwanted Koi or goldfish (which were put there by the previous owners of my house and property who were the ones who got Ducks Unlimited to construct the pond). Have never had too much trouble seeing them around the sides, i also find that you can toss feed to them and they will come up to the top after it and right into the sides, I expect a catfish would do the same. I am not sure about the exact depth as the pond was already present on my property when i bought it but it seems to be very deep and the fish that are present never seem to have any trouble surviving the winter.I definitely wouldn't mind being rid of the goldfish, its been a few years since i payed to have it stocked with trout, so there are probably only a few of those left as from my experiences they generally don't spawn in ponds. i did get one really nice sized trout out of there last year which must have been in there for a few years. I actually used to have a couple of pictures of it on my computer, not sure if they are still on it or not. I definitely would be willing to order a few, i have always had a keen interest in catfish and it would be neat to own one of the giants of the family.