This is slightly older in terms of data (2017) but the paper was only published a bit over a month ago. The 2017 estimate of 64,000 Green Sea Turtles off the island is impressive either way.
Article: 64,000 Sea Turtles Recorded Off The Coast of Australia | Reef Builders | The Reef and Saltwater Aquarium Blog
Research paper link: Use of unmanned aerial vehicles (UAVs) for mark-resight nesting population estimation of adult female green sea turtles at Raine Island
Article: 64,000 Sea Turtles Recorded Off The Coast of Australia | Reef Builders | The Reef and Saltwater Aquarium Blog
Research paper link: Use of unmanned aerial vehicles (UAVs) for mark-resight nesting population estimation of adult female green sea turtles at Raine Island