Wow, like it was stated before, just because somebody is a vet, doesn't mean they know everything, and they're definately not always right.
I'm curious to see what kind of snake they would say I have if I was to take my anaconda to the vet. I've had people say: "Nice Ball, looks healthy", "Nice Burmese", "Nice Boa". Atleast with the boa statement they're partially right. Some people have said I thought it was an anaconda once I stated what type of snake which I know was a jackload of crap.