Doug Perrine / Chambered / Pearly nautilus {Nautilus pompilius} Indo-pacifi

Juergen Freund / Chambered / Pearly nautilus {Nautilus pompilius} against fan coral, Australia.

David Shale / {Carinaria lamarki}, pelagic heteropod

Juergen Freund / Chambered / Pearly nautilus pair {Nautilus pompilius} Australia.

David Shale / Buccal mass (feeding apparatus) of {Carinaria lamarki}, pelagic heteropod

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

Jane Burton / Chambered / Pearly Nautilus (Nautilus pompilius) shells. Indo-Pacific.

Fred Bavendam / Paper Nautilus (Argonauta nodosa) is actually a pelagic Octopus, females make the parchment-like shell to carry incubating eggs, South Australia

Fred Bavendam / Chambered Nautilus (Nautilus pompilius), Milne Bay, Papua New Guinea

Flip Nicklin / Chambered Nautilus (Nautilus pompilius) coming out of its shell, North America

Flip Nicklin / Chambered Nautilus (Nautilus pompilius) portrait, North America

Elizabeth White / Cross section of Chambered nautilus shell

Juergen Freund / Pearly / Chambered nautilus caught in trap {Nautilus pompilius} Indo Pacific

Doug Perrine / Pearly chambered nautilus {Nautilus pompilius} Celebes Sea (Non-ex).

Juergen Freund / Pearly nautilus swimming, Indian Ocean

Juergen Freund / Diver with pair of Pearly nautilus {Nautilus pompilius} Great Barrier Reef, Queensland, Australia

Juergen Freund / Pearly nautilus swimming {Nautilus pompilius} Indo-Pacific

Juergen Freund / Close up of siphon of Pearly nautilus {Nautilus pompilius} Sulu-sulawesi seas. Used to fill shell with water to sink and expell water to rise, lateral movement by jet propulsion

Juergen Freund / Pearly nautilus {Nautilus pompilius} swimming, Indian Ocean

David Fleetham / Chambered nautilus (Nautilus belauensis) and divers, Palau, Micronesia. Model released.

David Fleetham / Chambered nautilus (Nautilus belauensis), with scuba diver, Micronesia. Model released.

David Fleetham / Scuba divers watching two chambered nautilus (Nautilus belauensis), Palau, Micronesia. Model released.

Ingo Arndt / Chambered Nautilus (Nautilus pompilius) cross-section, Meeresmuseum Ozeania, Riedenburg, Germany

Paul D Stewart / Portrait of Richard Owen and Moa leg (20, July 1804 - 18 December 1892) photo-engraved by Walker and Boutall around 1894 from an 1846 Daguerrotype. Owen was a comparative anatomist and palaeontologist...

Paul D Stewart / Portrait of Richard Owen (20, July 1804 - 18 December 1892), 1894 engraving from an 1840s painting by Pickersgill, later hand colouring. Owen was a comparative anatomist and palaeontologist. He coined...

Paul D Stewart / 18th Century engraving with contemporary handcolouring showing coral, squid and a nautilus shell. Such exotic objects were emblematic of any good cabinet of curiosities and held particular fascination...

Chris Newbert / Chambered Nautilus (Nautilus pompilius), Papua New Guinea

Chris Newbert / Chambered Nautilus (Nautilus pompilius), Papua New Guinea

Birgitte Wilms / Chambered Nautilus (Nautilus pompilius) 60 feet deep, Papua New Guinea

Juergen Freund / Pearly nautilus (Chambered) {Nautilius pompilus} Indo-pacifi

Juergen Freund / Pearly (Chambered) nautilus shell on beach {Nautilus pompilius} Philippines

David Fleetham / Swell shark (Cephaloscyllium sp.) after being brought up from 600 feet in a trap designed to capture nautilus, Indonesia, Pacific Ocean.

David Hall / Chambered nautilus (Nautilus vanuatuensis), a recently described species, in shallow water at night, Sakao, Vanuatu, Pacific Ocean.

David Hall / Chambered nautilus (Nautilus vanuatuensis), a recently described species, in shallow water at night, Sakao, Vanuatu, Pacific Ocean.

David Hall / Chambered nautilus (Nautilus vanuatuensis), a recently described species, in shallow water at night, Sakao, Vanuatu, Pacific Ocean. November, 1991.

Hiroya Minakuchi / Chambered Nautilus (Nautilus pompilius) shell cross-section showing chambers

David Fleetham / Palau chambered nautilus (Nautilus belauensis) in front of red Sea fan (Gorgonia) on a vibrant coral reef, Palau, Micronesia, Pacific Ocean.

David Fleetham / Two scuba divers observing two Chambered nautili (Nautilus belauensis) on a reef, Palau, Micronesia, Pacific Ocean. Model released.

Doug Perrine / Colonial salp chain (Salpidae), with tiny (about 1cm) Cephalopod sheltering inside one of the blastozooids, probably a male or immature female Argonaut / Paper nautilus (Argonauta sp.), drifting in su...

David Fleetham / Chambered nautilus (Nautilus belauensis) on a reef, Palau, Micronesia, Pacific Ocean.

David Fleetham / Palau chambered nautilus (Nautilus belauensis), Palau, Micronesia.

David Fleetham / Chambered nautilus (Nautilus pompilius) Indonesia.

Magnus Lundgren / Brown paper nautilus (Argonauta hians) juvenile, 1.5cm, riding on a piece of plastic waste. Balayan Bay, Luzon, the Philippines. GDT European Wildlife Photographer of the Year Competition 2022 - Man a...

Magnus Lundgren / Brown paper nautilus (Argonauta hians) juvenile, 1.5cm, riding on a piece of plastic waste. Balayan Bay, Luzon, the Philippines.

Magnus Lundgren / Brown paper nautilus (Argonauta hians) juvenile, 1.5cm, riding on a piece of plastic waste. Balayan Bay, Luzon, the Philippines.

Magnus Lundgren / Solitary salp full of various surfing animals such as parasites, amphipods and a male brown paper nautilus (Argonauta hians) off Anilao, Balayan Bay, Batangas, Philippines.

Magnus Lundgren / Brown paper nautilus (Argonauta hians) female drifting in the open ocean on a tunicate ( Pyrosoma sp.) Balayan Bay, off Anilao, Batangas, Philippines, Pacific Ocean

Magnus Lundgren / Brown paper nautilus (Argonauta hians) female riding on a jellyfish, off Anilao, Balayan Bay, Batangas, Philippines.

Magnus Lundgren / Brown paper nautilus (Argonauta hians) male riding on a jellyfish, off Anilao, Balayan Bay, Batangas, Philippines.

Magnus Lundgren / Brown paper nautilus (Argonauta hians) female riding on a jellyfish, off Anilao, Balayan Bay, Batangas, Philippines.

Magnus Lundgren / Brown paper nautilus (Argonauta hians) female riding on a jellyfish, off Anilao, Balayan Bay, Batangas, Philippines. .

Magnus Lundgren / Brown paper nautilus (Argonauta hians) male riding on a Sea angel (Hydromyles globulosa) Balayan Bay, Batangas, Philippines.

Magnus Lundgren / Brown paper nautilus (Argonauta hians) surfing on a jellyfish, Balayan Bay, Luzon, Philippines. The nautilus uses its jellyfish host both as a food source, and as a defensive weapon. Photographed at n...

Magnus Lundgren / Brown paper nautilus (Argonauta hians) surfing on a jellyfish, Balayan Bay, Luzon, Philippines. The nautilus uses its jellyfish host both as a food source, and as a defensive weapon. Photographed at n...

Magnus Lundgren / Brown paper nautilus (Argonauta hians) on bamboo, Balayan Bay, Luzon, Philippines. Photographed at night. Magnus