[below: the Great Barrier Reef from space]

[below: Catamarans (ships with two hulls) are very fast, but this means that the travel is very bumpy!]
Wow! It was. It was a big help that the sea was warm for swimming (an amazing 27 degrees C) and the tour company provided good advice and the right equipment. Once you get used to a snorkel mask (breathing through the mouth, not the nose!)and get comfortable swimming about you experience a tremendous feeling of freedom in three dimensions. Remember this is salt water so you are more bouyant than in a swimming pool, so it takes very little effort to float. The feeling is one of weighlessness, and excitement of a new environment and sensation.
[below: What's this?? A monster from the deep?]
[below: No! It's snorkling dude!]