It would cost 15$ in Australian money
Scuba Diving, exploring the reef itself, fishing.
Steve Irwin, he died when he was stung in the heart by a stingray while scuba diving in the great barrier reef in 2006.
There are scuba diving classes and popular scuba diving areas in Sydney, Australia. Scuba diving clubs are not advertised in that area.
The Great Barrier Reef is used mostly tourism these days and what they like to do while there is snorkeling, diving, sight seeing on the reef or they just like to do something more relaxing like have lunch on the pontoon or just have a nice swim.
united states
Not sure about travel agencies but most cruise lines and all inclusive resorts on the Ocean offer scuba excursions. Great diving in the Great Lakes too!
you can scuba dive swim at beachs
Scuba diving in the country of Indonesia is a world class experience. Diving in this area of the world offers views of exotic fish and beautiful reefs that are only visible in this part of the world.
Scuba diving.
There are currently no professional sports that involve scuba diving.
The Barrier Reef is a protected area, so I suggest getting local information and advice. I doubt if any boating activity is allowed, except possibly, scuba diving (with restrictions as to not removing or damaging the coral).