Cairns Great Barrier Reef

2019 Coral Spawning Night Dive & Snorkel

Once a year only, for a few nights in late spring or early summer, the Great Barrier Reef turns on a spectacular and sexy festival. On these nights many corals spawn in a mass synchronised event. This is a phenomenon unlike anything else in the animal kingdom, and it happens right here on the Great Barrier Reef! Tusa 6 provides fun and informative trips for certified divers and snorkellers to watch this unmissable event take place, and you can get involved!

When will coral spawning happen?

Linked to the phases of the moon, the most common timing for coral spawning on the Great Barrier Reef is 3 – 5 days after the full moon in late spring/early summer. There are many factors involved including minimal tidal movement, water temperature and light. Although there are no guarantees of the exact night of the coral spawning, experts can usually predict the spawning about a month prior.

What is coral spawning?

Hard corals reproduce by releasing huge clouds of eggs and sperm into the water in an amazing synchronised display. Imagine snorkelling or diving and seeing billions of colourful confetti-like objects filling the ocean around you in a whirling, eddying underwater snowstorm. This is an unforgettable and unmissable experience!


  • Cert dives with full gear hire – $270p/p
  • Cert dives tanks & weights – $240p/p
  • Snorkel only – $200 Adults $150 Children


  • 2 x certified dives or 2 x snorkel sessions
  • Free guided snorkel tour
  • Torches (incl for full gear cert and snorkel)
  • Glow sticks
  • Dive computers
  • Wetsuits
  • Hot buffet dinner
  • Tea, coffee & hot soup
  • Reef Levy


  • Guided dives $15.00 per dive
  • Torch hire for $10.00
  • Tanks & weights

Want to join in?

To book, you can book online HERE or call Tusa Dive Reservations at 4047 9100 or email Full payment is required at time of booking. No refunds for cancellations within 24 hours. Special offers, discounts, and day trip vouchers are not available for Coral Spawning tours. Hotel pickups and Nitrox fills are not available for Coral Spawning. Tusa Dive does not guarantee you will see the Coral Spawn. The coral may spawn on one or several nights, however it is impossible to predict.

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