My little Green Anaconda is about 2.5 - 3 feet in length. Very Young i would have thought.
As murinus said i have asked him because he has got experience in these snakes as i am certainly no expert myself. I have a 5 foot Red Tailed Boa and a small Royal Python but they are in no way aggressive like the anaconda.
It seems that this Thread has opened a fantastic discussion but appears to me that there are no Anaconda experts out there but merely people whom have tried to look after their pets to the best of there ability.
Yes the internet is a great resource of information but in my opinion you can't beat the experiences of someone who has looked after the animal in question first hand.
Unfortunatley we don't all have Jesus Rivas' telephone number and we are thousands of miles aways from the America's so we shall all have to do the best we can.
In my experience there is no right or wrong in this hobby, It's what works that counts and what may work for you may not work for me, above all it's whats right for the snake that is most important.
I think we are all in agreement that the Anaconda comes from the humid South America's and does in the wild spend a fair bit of time in and around water, (because it can). But i think what murinus is trying to say, his experiences have taught him that this is not a 100% requirement for the snake to still live a happy and healthy life in captivity. I am in no way choosing sides here but just making a point that all animals including human beings are very adaptable in life and have to be to survive. Therefore if we meet the basic requirements of survival we as animals (just as snakes are) are able to adapt the best we can to succeed and thrive.
We haven't been around for millions of years on this planet by being un-adaptable.