In Shanghai, the main zoo and the aquarium often have strange mixes, due to just plain lack of knowledge or lack of caring. For example, mixing Chinese Sturgeon with Red-tailed Catfish, Malawie Chiclids with goldfish and for some reason, a giant Pleco with a even bigger albino Chinese Softshell Turtle in a massive tank with pretty much nothing else. I think I remember the zoo at one point mixing African Painted Dogs with Grey Wolves...apparently, that didn't go so well as they were later separated, with the wolves keeping their exhibit, and the painted dogs getting an exact duplicate, despite their varying requirements for habitat (you would think even the most amateur designer can tell grassland from tundra, but no, not here). They also mixed one of the last Swinhoe's Softshell Turtles with Chinese Alligators. The alligators were fed fish, so it wasn't too much of a risk, but putting one of the earth's last Swinhoe's turtles in a tank with alligators isn't a risk I'm willing to take. They also allowed (or just didn't care) for visitors to throw coins at the turtle, and I saw some pale marks on the shell where people had thrown heavier things. And this, reminding all of you, is one of the last of it's kind, an animal that should be under heavy protection. In America, you don't let people throw beer bottles at Whooping Cranes.
Then there's also the thing where they throw live ducks and chickens into the reptile tank (I say tank here because often its a giant area filled with trees and bushes and vegetation about the size of an average living room, maybe a bit more, with around 10 large reptiles in it), because many children TOTALLY need to see the blood and gore of a little duck getting torn to pieces by a Chinese Alligator, or going down the digestive tract of a python. Totally.