Scuba.
Bob chose to scuba, something he had not done before. Those who wanted to scuba were given a half an hour lesson on how to use the mask and other diving equipment and were shown a short video on the procedure. We could rent undewater cameras which could take 27 exposures. Each professional diver had 4 of us with him. Since most of us were just trying to stay alive, the diver took most of the pictures. This is a giant clam.