Never seen this before

So, I visited the zoo today and I noticed something that I had never seen before. I haven't been to the zoo where I live since I was maybe around 7 or eight(15 now), so everything was different. They have a building with all the frogs, turtles, snakes, etc. I went over and noticed that they had a red tail boa and a green anaconda in the same enclosure, something I had never seen or heard of before. I did notice that the boa was overweight though, but the question in wouldn't they hurt each other? The enclosure wasn't big at all, maybe big enough to house a male boa?
The anaconda was in the pond area, which took up most of the cage, resting its head on the rocky ledge which is where the red tail boa was at so really they were nose to nose.

Typically co-habbing snakes of the same species - never mind different species - is a no-no.

Zoos, like many big box pet stores, aren't well known for keeping reptiles at the same high standard that most of us do.

I don't know the answer to the 2 different species of reptiles in the same place, but I do know that zoo animals held together are almost always overfed. Buddy of mine works at a large aquarium and if you ever go into an aquarium and wonder why the sharks don't eat the other fish they are swimming around with, it's because the sharks are well fed by the staff.