Great Barrier Reef - Views of Fish from Sub - I tried swimming in the surf off Green Island with an underwater camera but there was only one fish that I photographed. The best fish viewing came when we went down in a submarine. We saw a sea turtle, sting rays, giant clams and eels, sea cucumbers and all manner of big and tiny colourful fish and living coral. It was a fascinating peak at another world. I learned that even the fish avoid direct sunlight if they can. Even though you are out in the open ocean the coral around the island makes a haven for the fish in the shallow water of the coral reef.