Kim, listen!
It's not a moral debate. It's an ecological debate. Dang, it's pretty darn simple! Stop trying to cloud the discussion.
And I mentioned any seafood or wild animal in my post. Such harvesting is VERY different in terms of impact on wild animal population from harvesting farmed animals. On the one hand, you impact wild animal populations by killing them. On the other, you don't. Simple, really.
And, frankly I don't think you know diddly about what is sustainible any more than the vast majority of hunters have over the history of mankind. Everyone always thinks that what they are harvesting now is sustainible. THIS TIME we have it all figured out. That's total crap! Populations almost always decline and in the vast majority of cases, our assumptions about sustainibility are dead wrong.
My guess is that your assumptions, based on numbers provided by the whaling industry, will prove to be dead wrong too. If we had been discussing this in 1900, you would be telling me how there are so many Right whales, we have nothing to worry about.
I know your wife is Japanese, so you for some reason feel like you have a personal stake in defending whaling, but you should read others' posts lest you look like you are just irrationaly defending whaling for personal reasons without really considering the argument. Oops...too late.