Ignorance is the biggest problem of all for the ocean - and for many other things as well.

Fortunately, we know more about the problems that we have than in all preceding history. We know now the consequences of the things that we put into the air, into the water - of the way we treat life on Earth.

The opportunity that is unique [to our] time is what inspires me to do everything I can to move things forward. This is the first time that we have the capacity to understand our place in the greater scheme of things to the extent that we do.

I am not in any hurry to grow up.

I am driven by what I know; that the world I love is in trouble.

Sharks are beautiful animals, and if you're lucky enough to see lots of them, that means that you're in a healthy ocean. You should be afraid if you are in the ocean and don't see sharks.

There are now more than 4,000 places in the sea around the world that have some kind of protection. The bad news: You have to look hard to find them. What you find instead is destructive fishing, mining, gas and oil exploration.