We are on Lady Elliot Island, 30 minutes by air from the mainland. See www.ladyelliotisland.com.au for details.
Our highlights have been spotting manta rays from the comfort of a glass bottom boat; seeing turtles while snorkeling from the security of the glass bottom boat; getting a private wading tour of the tidal lagoon; and spotting a hatchling loggerhead turtle making its solitary way to the night sea.
On the other hand, I am intimidated by rough seas, tides, currents, and sea creatures. When we set off to do a self-guided snorkeling run, I was relieved when we decided conditions were beyond our skills.
And I am the son of a sailor.