What I think we need, is someone to write a paper on that MORON robert lafrana, as he seems to be able to talk through his!!!There is a species of tortoise here in Australia that also had need for a permeable bit of skin in contact with the water. It took a very different evolutionary path - its cloaca has adapted to absorb oxygen a bit like a primitive gill. That's right - it can 'breath' underwater through its backside!