For this portion of the trip, we took the Tusa III out of Cairns (pronounced
"Cans") out to Michelmas Cay and Hastings Reef, both about 40km
off shore. Here we could dive or snorkle as befitted our training. When
we take the students to the reef, we will arrange for a snorkling trip and
if you want to dive, and have the training, you can upgrade your outing
at a small extra cost. 
These are real colors! Who would have thought that there would be so many shades of blue?
Didn't see any of these!