I actually love diving at night; you see a lot of fish then that you don't see in the daytime.

With every drop of water you drink, every breath you take, you're connected to the sea. No matter where on Earth you live.

Meat reared on land matures relatively quickly, and it takes only a few pounds of plants to produce a pound of meat.

It's an appreciation for life generally, every bit of life, the smallest creature that lives in the intestines of termites that make termite life possible - to the leaves that turn out oxygen and grab carbon dioxide and with water make simple sugars that feed much of the world. I mean, these are everyday miracles.

It isn't too late to shift from the swift, sharp decline of ocean systems in recent decades to an era of steady recovery. There is time, and there is a growing awareness, which is the best way to counter indifference. People who know might care.

No water, no life. No blue, no green.

When I write a scientific treatise, I might reach 100 people. When the 'National Geographic' covers a project, it communicates about plants and fish and underwater technology to more than 10 million people.