Wow! Just look at this amazing coral reef and beautifully coloured tropical fish. This underwater paradise is located around Fiji in the South Pacific ocean – a country made up of over 300 islands that boasts some of the planet's most spectacular wildlife.

Fiji has the world's third longest barrier reefs.Called the Great Sea Reef, it is home to whales and dolphins, sharks and turtles and giant clams which can grow to over one metre across! This strange creature here is a poisonous blue-spotted sting ray.

There could even be animals living on Fiji's Great Sea Reef that are unknown to science. A recent survey by WWF found a completely new species of damsel fish – a bit like this one, which had never been seen before.

But in recent times, the reef and its incredible wildlife has come under threat. Years of overfishing, pollution, and destructive harvesting of live coral and exotic fish have damaged Fiji's underwater paradise.

Making things worse, large fleets of fishing boats from other countries have come to take fish from the South Pacific. Having emptied their own waters, these boats come to catch fish like tuna – often accidentally catching animals like turtles and dolphins in the process.

But with support from WWF, the government of Fiji have decided to set up a huge network of Marine Protected Areas. This network will be complete by 2020, and, covering an area of the sea 18 times the size of Wales, it will be the largest underwater sanctuary in the world.

These Marine Protected Areas will contain some areas where fishing is not allowed. Locally called "Waitui Tabu" zones, these places will protect the reef and help fish populations to recover. This is good news for the environment and local fishermen. If there are lots of fish, then people will be able to continue fishing in the future.

While around 12 percent of forests are protected, less than one percent of your planet's oceans are protected. So, with WWF's help, Fiji is leading the way in underwater conservation!