[wes]

Thanks Trux, that confirmed my general understanding from reading the older post Naid had linked to. It is pretty fascinating stuff. Makes you wonder how seals and whales avoid O2, CO2 and N toxicity on thier deep and long dives. Seems a very good test would be to implant a device to measeure all those gases in thier blood over time and store data from a long dive. Seems would be a treasure trove of info though technically a very very difficult experiement to do, especially to not injure the animal at the same time. Maybe if we could learn whale or dolphin language we could just ask them?

Cheers