Snorkling at the Great Barrier Reef. Photos of Ash and me from Poseidon. The Agincourt Ribbon Reefs are long narrow reefs located along the very Outer Edge of the Great Barrier Reef, flushed out at every tide by clear oceanic water welling up from the Coral Sea Trench nearby. Coral thrives in this clear water, creating spectacular gardens and a huge variety of marine life. These pristine reefs are opposite the Daintree Rainforest, well North of any agricultural run-off from cultivated areas, and provide the best possible snorkelling and diving opportunities.
