We thought we had a handle on all the reef fish diversity evidently not.

If we get all of the fish of a coral reef together and weigh them, this is what we would expect.

And that is the same reef that's the same reef 15 years ago that's the same reef today.

And there's a beautiful reef, very complex reef, with lots of animals, including a lot of octopus.

We're crocheting a coral reef.

Coral reef in New Caledonia.

I'd never seen the reef here before.

Coral reef ecosystems are invaluable human treasures.

Very unlikely, Joe would jump on a pristine coral reef, a virgin coral reef with lots of coral, sharks, crocodiles, manatees, groupers, turtles, etc.

Why on earth are you crocheting a reef?

I'm an ecologist, mostly a coral reef ecologist.

The coral reef is the region's prime attraction.

They clean the reef everything that grows enough to be seen, they eat, and they keep the reef clean and allow the corals to replenish.

The Australian Great Barrier Reef is another success story.

Why not chisel a coral reef out of marble?

Now, see this strange, underwater, coral reef looking thing?

Under the realization from tourist operators, fishermen, the Australian Great Barrier Reef Authority and scientists that the Great Barrier Reef is doomed under the current governance regime.

Do we have evidence of this? Yes, coral reef systems.

This is our invocation in crochet of a bleached reef.

How does the reef work? Well, it's very, very simple.

Another example Nassau groupers in Belize in the Mesoamerican Reef.

And the people in Chicago made a reef of their own.

Big fish eat little fish.

The water had started coming back. It was foaming over the reef.

Anyway, one tree is situated right next to a beautiful coral reef.

The reef is 1,600 kilometres long and covers about 8,000 square kilometres.

The big fish eats the little fish.

And so now you can walk through a coral reef without getting wet.

I want to be able to go back to this reef. Thank you.

I believe this fish is a freshwater fish.

So in 2007 we had an exhibition, a small exhibition of this crochet reef.

So we had our own miniature rainforest, a private beach with a coral reef.

It's the only threat, the only influence that the reef had to deal with.

If Joe jumped in a coral reef, there are many things the alien could see.

It's like scuba diving into a coral reef, except you're going upward instead of downward.

It turns out they've got to fish where the fish are.

Finally, oysters can attenuate and agglomerate onto each other and form these amazing natural reef structures.

Well, the good news is it's recovered and recovering fast, faster than any reef we've seen.

Fiji notes the need for the mainstreaming of sustainable coral reef management into national development strategies.

This picture was just taken by Brian Skerry a few months ago when we returned to the Phoenix Islands and discovered that, because it is a protected area and has healthy fish populations that keep the algae grazed down and keep the rest of the reef healthy, the coral is booming, is just booming back.

The small island developing States, and countries with long coastlines and low lying areas, pointed out that they experience severe floods and drought, adverse effects from changes in the El Niño phenomenon, tropical storms and changes in their patterns, saltwater intrusion, storm surges, coral reef damage, and changes in migratory patterns of important fish.

Fish eyes

Fish Eyes

Fish Fillets

Poverty relief is to give someone a fish poverty eradication is to teach someone to fish and becoming affluent is to build a fish pond for farmers so that farmers can breed fish.