Anyway, the way I see this we aren't some kind of marxist commune that has to share everything they own, but rather it's up to the finder to decide what to do with the loot.
((The way
I see it, we're a team. Should I get punished because I chose to heal Lyu instead of getting first dibs on searching? Should the others fall behind because they were busy enough with other stuff to let us do the loot-finding?))
((1. Really, I'm a magpie because I loot after the battle when there wasn't much of anything else I can do? Allright then.
((No, he never said that. If everyone had to find their own loot or trade with fellow party-members to get it, though, everyone else would be searching instead of other stuff, assuming they could, which would make everyone magpies.
And refusing to give up any loot is a bit...magpish.))
4. Still doesn't mean you would have gotten to keep it at any point.
((I don't think he's saying that...))
That is indeed possible. If he knows that sperm whales exist and such a solution is viable. But really, what's the point in being able to breathe underwater if you can only go down a couple of feet?
Without any kind of diving gear, people commonly dive to a dozen feet or more, without even expelling air from their lungs. Some people manage to (briefly) achieve depths in the hundreds of feet without significant problems (and what problems there are have more to do with eardrums than sphincters.
And rereading...why would depths lead to air being forced from your lungs?
You have no idea how much oxygen mammals in general need, do you?...
I do. I said eas
ier, not eas
y.
And you have some facts...off. Firstly, dolphins don't have terribly long breath-holding times, but sperm whales can go an hour or so, without extracting additional oxygen from the water. And all that complexity you cite isn't really the issue; that would be from high metabolic rate, which is almost entirely due to the constantly high body temperatures mammals keep. Brain activity is a pretty big sink, a solid quarter, but it's not entirely enormous. And, remember, these are with normal creatures; with sufficient biological knowledge, because body-modding wouldn't work without at least a subconscious understanding of it, I have no doubt one could find a way to exceed the record-holders of real-world biology, without even considering magic.
(Okay, there are a few species of endothermic fish, but they're the exception.)
And this fishman wouldn't be?
The percentage of oxygen in water can be measured in parts per million...
((You're assuming baseline human metabolism. I can't find any sources, but I'm pretty sure you could reduce it significantly if you had to.))
He'd still have to do it exactly right. One fuck-up and stuff would go terribly wrong, since he's futzing around with very delicate and rather important processes. And given Thuun's proclivity for disasters, I'm going to go ahead and say he'd die.
((Fair enough.))