Great Barrier Reef Coral Spawning Expeditions


Don’t miss the opportunity to see coral spawning on the Great Barrier Reef on our special night trips. Once a year, usually just after a full moon in late spring or early summer, all the corals on the reef spawn at once in a dazzling display. 

You’ve probably never thought about how coral reproduces, but the answer is nothing short of spectacular! Millions of tiny cells come shooting out of corals all over the reef in a mass synchronised event, pouring into the water like champagne bubbles and forming a massive pink ‘slick’ that coats the surface.  

This rare and dramatic phenomenon lasts just a couple of nights, after which the tiny baby corals settle down onto the reef and find a place to grow and flourish. 

A nighttime coral spawning dive trip is an unforgettable experience. We offer dedicated Great Barrier Reef coral spawning night trips from Cairns for divers and snorkellers, giving you the chance to see the action and return to Cairns.

Alternatively, join our overnight vessel during the coral spawning dates for another chance to view this weird and wonderful sight.


Late November/early December 2021

Departure/Return Location:

Cairns Marlin Marina


  • Guided snorkel sessions
  • Full dive/snorkel equipment including torches, wetsuit/lycra suit and prescription masks
  • Equipment tuition
  • Dinner
  • ​Tea, coffee and hot chocolate
  • Hot freshwater showers

Dates for next year’s coral spawning event will be confirmed mid-2021 depending on weather and other conditions.

Additional info


  • Digital camera hire
  • Soft drinks, alcohol and snacks
  • Quality souvenirs
  • Professional dive guide ($15 per dive)
  • Nitrox fills (subject to availability)

What to bring

  • Swimsuit and towel
  • Certcard and logbook for certified diving
  • Warm clothing and socks