Love is in the  sea
It's springtime  and love is in the sea. It's Hot; the sea temperature that is. And after the  romantic full moon rises, you have to be under the sea at night to witness the  world's largest living organism, the Great Barrier Reef, undertake its annual  reproductive cycle.
Only Scuba  divers and those that have gills can witness this natural wonder as the corals  release their eggs into the warm water, then rising to the surface like  thousands of bubbles in a champagne flute.
Annual coral  orgies, the simultaneous mass spawning of corals on the Great Barrier Reef were  first observed scientifically in 1981.
Scuba diving the  Great Barrier Reef during coral spawning is an amazing experience and to add to  that experience, the coral spawn only at night, 
Coral spawning  is now the focus of international research, but nature cannot be totally  predicted.
The process  begins six months before when eggs and sperm begin to form inside the coral  polyps. For spawning to take place, water temperatures must be at least 27  degrees. 
However, corals  need a specific cue so they can release eggs and sperm into the water at the  same time. That cue is November's full moon and on the 2nd to 6th night  following the full moon, the majority of corals spawn. This year, coral spawning  is expected to occur around November 25, 26 & 27 (give or take a few  days)
Spawning is  timed to coincide with periods when there are minimum tidal movements, which  allows the reproductive components time to find representatives from the same  species and mix and match before being swept away. Some years there is 'split'  spawn with corals in shallow warmer inshore reefs performing in November while  those in colder waters on the outer reefs, spawn in  December.
Corals make such  an effort to spawn at the same time in order to increase opportunities for  fertilisation. Mass spawning also overwhelms the appetite of predators.  Developing larvae (planula) are swept off to begin new reefs. A planula attaches  itself to a vacant patch of reef and starts to grow as the founder polyp for a  new coral colony. Coral spawning is a once in a lifetime experience and the  highlight of diving at night.
Turtle breeding  
Although the  whales have returned south, boaters still need to keep an eye out on the water  as marine turtles have begun the mating phase of their breeding cycle. Turtles  mate on the surface, and there are a fair few turtles in the area, so ensure you  stay clear for their protection, as they may not be aware of your  approach!
Marine  Notices
Boat Haven Bay,  (Muddy Bay), adjacent Airlie Bay: hazard to navigation, a lighted buoy Fl Y 3s  is established in position to mark the drying wreck, a steel coral viewing  vessel, situated just off the rock wall of the Whitsunday Sailing  Club.
Boat Haven note:  A meeting of the Proserpine Shire Council on June 9, 1960 approved the adoption  of 'Boat Haven' as the name for the bay at the eastern end of the Town of  Airlie, till then known as Muddy Bay. The idea was to rid that muddy bay of the  stigma of the earlier name. Source: Ray Blackwood. 
Dent Passage  caution 
Mariners are  advised that vessels transiting Dent Passage off the western end of the Hamilton  Island airport runway are cautioned about frequent day and night aircraft  movements. Vessels with an overall height greater than eight (8) metres are  advised to keep clear of the flight path zone during aircraft movements. A  chartlet (Map S11-41 dated 8 November 2010) details 'distance from runway' and  'mast height' restricted areas.
AUS charts 252,  253 & 254
Fair winds to  Ye!
Cap'n  Dan
