This minute master of camouflage survives by adapting its body to closely resemble sea fans, the soft coral it calls home. It's just one of the many creatures that could disappear along with the Great Barrier Reef because of global warming.
The stonefish hides itself among the coral using its crusty exterior as camouflage. It's earned the title of most venomous fish in the world, thanks to two sacs of poison on each of its 13 spines. The spines have pierced the soles of shoes, so look out!
Pixar's 2003 "Finding Nemo" brought these guys to the big screen, acquainting us with their symbiotic relationship with sea anemones. They start life as males and later develop into females, a process known as sequential hermaphroditism.
These spiky, venomous invertebrates are one of the Great Barrier Reef coral's chief nemeses. Scientists estimate these creatures are responsible for nearly a quarter of coral destruction over the past three decades.