Here is a little Triplefin taken on snorkle at Island Bay, Wellington, New Zealand. Taken with a Olympus C-7070 in an Ikelite housing, Mode - Super Macro, Strobe - can't afford one yet!
Octopuses, Argonauts, Cuttlefish, Squid, Nautilus. Covers the world, especially the Pacific and Indian Oceans, Atlantic, Caribbean, Arctic and Antarctic.
This article will hopefully be of interest to divers considering a career in commercial diving or wishing to complete a commercial course for other reasons. Hopefully it will give you a bit of an insight into what to expect.