I would rather have this post entitled with the query "what is the largest snake in the world?" - but I can't, since there would be two separate answers to that question. In this case, there is the heaviest snake and then there is the world's longest snake. Well, of course this is on average because not all snakes grow the same. In fact, if some of them live long enough, they may keep growing to sizes we haven't even reported yet.
Anyway, one answer involves a type of anaconda and the other is a type of python. Sure, it would be simpler to just say that the anaconda is the largest and/or make wild claims that we often hear (like 30 to 40 foot anacondas that have never been proven to exist, yet) and be done with it, but that would be too easy; ha! Personally, I'm not a fan of snakes by any means nor do I enjoy being around spiders, either. However, since this is a nature blog, I'll just have to go forward regardless of my preferences. Currently, I've only did one other post about snakes (Viperine Grass Snake) although I did mentioned 'em on my summary post about reptiles. At any rate, when I hear the word anacondas, I usually think about the 2 popular anaconda movies I seen several years ago. I enjoyed both of those movies, but it wasn't like I was anywhere near those freakish monsters while watching the flicks within the safety of my own home - which is a good thing!
Okay, now back to the main questions...
Q: What is the heaviest snake in the world?
A: The Green Anaconda (Eunectes murinus)
Although they average a weight of 66 to 150 lbs., the heaviest scientifically verified specimen was a female measuring 17.09 feet long and weighing 215 lbs.!
If you'd like to read more about this slithering beast, go here: http://en.wikipedia.org/wiki/Eunectes_murinus
Q: What is the longest snake in the world?
A: The Reticulated Python (Python reticulatus)
Adults can grow up to 22.8 feet in length,, but normally grow to an average of 10 to 20 feet. They are the world's longest snakes and longest reptile, but they are not the most heavily built.
If you'd like to read more about this freak of nature, go here: http://en.wikipedia.org/wiki/Reticulated_python
Well, I hope that answered your questions and I also hope that you never find either one of those snakes coiled around you! Cheers!
---End of Post "What is the heaviest & longest snake in the world?"