I am pretty sure though that crocodilians take the cake for who can stay under water the longest..
They have a special valve in their heart (not sure but it could be the bipedal valve) that can shut off oxygen to their body and redirect it to there brain......
Then again many turtles can do some cloacal breathing under water ...
Hummm - I made myself wonder now
1.3 Coastals 6.6 Jungles
3.4 West Papuan 1.0 Bred'ls
1.1 Yellow condas 0.1 Sebea
**looking for female Bredl's python**