Take stock of the fascinating marine life of Australia's Great Barrier Reef

Toothless tropical fish off the coast of Heron Island.

Large squid close-up.

Blue Christmas tree worm.

sea anemone.

Nudibranch, which is a marine mollusk.

Sweet-lipped fish from Norman Reef.

A variety of marine life around a coral reef that is part of Australia's Great Barrier Reef.

A parrotfish hiding in a coral reef.

A sharp-billed fish is using its nose to probe the situation around the reef.

Anemone fish hiding in a silky reef.

A pink-eyed colorless goby rests on a coral at Flinders Reef.

An orange starfish lying on an osprey reef coral.

A turtle swims past a coral reef on Heron Island, which is now one of the world's most important reef research sites.

A clownfish is struggling to swim through the anemone "bush".

Pink camouflage fish off the coast of Lady Irrit Island, the southernmost reef of the Great Barrier Reef.

Sharks swimming directly above Osprey Reef, Osprey Reef is also part of the Great Barrier Reef.