A group of swimmers snorkel over a coral reef. © Reef Unlimited/GBR Biology

Great Barrier Reef, Tropical North Queensland © Reef Unlimited/GBR Biology

Brittany Wassing, Operations Supervisor and Senior Marine Biologist, Reef Unlimited/GBR Biology © Reef Unlimited/GBR Biology

Brittany Wassing, Operations Supervisor and Senior Marine Biologist, Reef Unlimited/GBR Biology © Reef Unlimited/GBR Biology

A marine biologist and a group of people sit around a glass-bottom viewing window on a boat. © Reef Unlimited/GBR Biology

Reef Unlimited/GBR Biology, Great Barrier Reef, Tropical North Queensland, Queensland © Reef Unlimited/GBR Biology

One person holding clapsticks and another with traditional face paint, stand aboard a boat. © Reef Unlimited/GBR Biology

Reef Unlimited/GBR Biology, Great Barrier Reef, Tropical North Queensland, Queensland © Reef Unlimited/GBR Biology

An underwater shot of a group of swimmers snorkelling over a coral reef. © Reef Unlimited/GBR Biology

Reef Unlimited/GBR Biology, Great Barrier Reef, Tropical North Queensland, Queensland © Reef Unlimited/GBR Biology

A group of people standing in a lab gather around a microscope. © Reef Unlimited/GBR Biology

Reef Unlimited/GBR Biology, Great Barrier Reef, Tropical North Queensland, Queensland © Reef Unlimited/GBR Biology