The last time I was here 45 years ago the big thing to do in Cairns was to take a boat out to Green Island to view the reef. I dislike boats and had low expectations of the trip but did it anyway for nostalgic reasons.
We wandered around a little, ate a lot and took a short trip on the glass bottom boat.
It was nigh on impossible to get decent shots of the reef or fish -- so sorry to disappoint you. I'll show you the best I could do tomorrow.
By the way, this was a Sunday so should have been my day to follow the Road that Beckons but as this was a full day trip we ran out of time ... a shame, I had noticed a street called Toogood Street on the way into Cairns, it would have been a perfect choice.