Juergen Freund / Coconut / Veined octopus (Octopus marginatus) hiding in its shell home. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Coconut / Veined octopus (Octopus marginatus) in a bottle cap getting a new shell to use as its home. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Coconut / Veined octopus (Octopus marginatus) hiding in its bottle cap home, using a shell as a door. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Coconut octopus / Veined octopus (Octopus marginatus) in its shell home. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Coconut octopus / Veined octopus (Octopus marginatus) in its shell home. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Coconut / Veined octopus (Octopus marginatus) hiding in its shell home. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Portrait of Chambered Nautilus {Nautilus pompilius} Underwater, Papua New Guinea

Juergen Freund / Coconut octopus (Amphioctopus / Octopus marginatus) inside an empty snail shell, Batangas, Philippines.

Juergen Freund / Mimic octopus (Thaumoctopus mimicus) entering a burrow on the seabed, North Sulawesi, Indonesia.

Juergen Freund / Mimic octopus (Thaumoctopus mimicus) mating pair, North Sulawesi, Indonesia.

Juergen Freund / Nautilus shells (Nautilus pompilius) collected and sold for the decorative market, Indonesia, July 2008.

Juergen Freund / Reef octopus (Octopus cyanea) foraging on coral reef, Komodo NP, Indonesia, Indo-pacific.