Juergen Freund / Chambered nautilus (Nautilus pompilius) with red whip coral. Osprey Reef, Great Barrier Reef, Queensland, Australia.

Juergen Freund / Sharks, mainly grey reef sharks (Carcharinus amblyrhynchos) feed at bait, North Horn, Osprey Reef, Coral Sea, January

Juergen Freund / Map and guide to Ningaloo Reef Marine Park, Osprey Bay, Ningaloo Reef, Western Australia

Juergen Freund / Divers attach temperature + depth recorder tag on Whitetip reef sharks tail {Triaenodon obesus} Osprey Reef, Coral Sea, Australia

Juergen Freund / Marine biologist collects Nautilus in trap from 300m depth, Osprey Reef Coral Sea,

Chris Newbert / Bigeye Trevally (Caranx sexfasciatus) school, Osprey Reef, Coral Sea