Following is a transcript of the video. Narrator: This is the Great Barrier Reef, and it's dying. Less than 20 years ago, the world's largest living structure looked like this, and this.

turning the host animals skeletal white. Fleshy seaweeds may then choke out the remains. Major bleaching in the Great Barrier Reef and elsewhere in 1997-98 was linked to a severe El Niño year and ...

For decades, the Great Barrier ... many inside the Barrier Reef World Heritage Area. Dredging is problematic for a few reasons. Firstly it digs up seagrass meadows, removing valuable grazing areas for ...

The reef also supports a variety of other marine life, including dolphins, sea turtles, sharks, and whales. There are many different types of coral found in the Great Barrier Reef, including ...

Many visitors say the Great Barrier ... of fish, sea turtles and humpback whales, Cairns' reefs are teeming with wildlife. Known locally as the Outer Barrier Reef, these reefs are ideal for ...