Far and away, the greatest threat to the ocean, and thus to ourselves, is ignorance. But we can do something about that.

We have been far too aggressive about extracting ocean wildlife, not appreciating that there are limits and even points of no return.

There is a terribly terrestrial mindset about what we need to do to take care of the planet - as if the ocean somehow doesn't matter or is so big, so vast that it can take care of itself, or that there is nothing that we could possibly do that we could harm the ocean.

I'm not against extracting a modest amount of wildlife out of the ocean for human consumption, but I am really concerned about the large-scale industrial fishing that engages in destructive practices like trawling and longlining.

Every time I slip into the ocean, it's like going home.

He's been the one consistent scoring threat that we have had thus far. We need to find a few more.