Vic's skill at finding whole shells exceeds mine. He has found a whole olive (tubular shell, top left), a whole Scotch bonnet (bottom left), and a whole whelk (bottom center).
I did find a very nearly whole Scotch bonnet, but I have yet to come across anything like a whole olive or whelk. I also found a weird, shell-hard egg case (center, top). Still love beachcombing, though.