The Ocean Health Index is like the thermometer of the ocean. It will allow us to take the temperature to know what is going on at the global level, trying to integrate different impacts, including overfishing, invasive species, coastal development, and climate change.

Most of the reefs [around Christmas Island] are dead, most of the corals are dead, overgrown by algae, and most of the fish are smaller than the pencils we use to count them.

What we have now - a world without [marine] reserves - is like a debit account where we withdraw all the time and we never make any deposit. Reserves are like savings accounts.

When I was a kid, Jacques Cousteau was my hero and the person who inspired me to become an underwater explorer. I have many other people who inspired me after him, but he is still my all-time hero.

In the Mediterranean of my childhood, there were no large groupers, sharks, or whales. All I saw was seaweed and a few fish, smaller than my little diving mask. All the large animals were gone, simply because we had eaten them.

The ocean is like a checking account where everybody withdraws but nobody makes a deposit. This is what's happening because of overfishing.

What better way to learn about life in the ocean--and how we are changing it--than through stories of blind zombie worms, immortal jellyfish, and unicorns of the sea? The Extreme Life of the Sea is an insightful book that inspires awe and wonder about our ocean, and brilliantly shows us the immense possibilities of life on Earth.