David Shale / Deepsea Hermit crab with zoanthid (Epizoanthus sp) on shell, from a coral seamount in the Indian Ocean, November 2011

Sue Daly / Anemone Hermit Crab (Pagurus prideauxi). Maseline harbour, Sark, British Channel Islands, October.

Sue Daly / Anemone Hermit Crab (Pagurus prideauxi). Maseline harbour, Sark, British Channel Islands, October.

Sue Daly / Anemone Hermit Crab (Pagurus prideaux) courtship behaviour. Maseline Harbour, Sark, British Channel Islands, September.

Sue Daly / Anemone Hermit Crab (Pagurus prideauxi) mating behaviour. Maseline Harbour, Sark, British Channel Islands, September.

Sue Daly / Anemone Hermit Crabs (Pagurus prideaux) engaging in courtship behaviour. Maseline Harbour, Sark, British Channel Islands, September.

Sue Daly / Hermit crab (Pagurus prideaux) with cloak Anemone (Adamsia carcinopados) Channel Islands, UK October

David Shale / Hermit crab with anemone. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Hermit crab with anemone. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Hermit crab with anemone. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

Solvin Zankl / Hermit crab (Dardanus arrosor) and Parasitic anemone (Calliactis parasitica) San Pietro Island, Sardinia, Italy, Mediterranean, July

David Shale / Deepsea Hermit crab with zoanthid (Epizoanthus sp) on shell, from a coral seamount in the Indian Ocean, November 2011

Juergen Freund / Anemone hermit crab (Dardanus pedunculatus) with anemone on its shell, walking on the sandy sea bed. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Anemone hermit cab (Dardanus pedunculatus) with several anemones on its shell. Lembeh Strait, North Sulawesi, Indonesia.

GEORGETTE DOUWMA / Anemone hermit crab (Dardanus pedunculatus) with shell covered in debris, Komodo, Indonesia

Chris Newbert / Hermit Crab (Dardanus sp) with anemone covered shell, Papua New Guinea

Doug Perrine / Hermit crab {Dardanus venosus} with symbiotic anemones {Calliactis sp} growing on its shell, providing camouflage and protection, Dominica, Caribbean

Nature Production / Anemone Hermit Crab {Dardanus pedunculatus} camouflaged with sea anemones {Actiniae} on its shell, Izu, Shizuoka, Japan

Fred Bavendam / Anemone Hermit Crab (Dardanus pedunculatus) carrying Sea Anemones on its shell for protection from predators, Bali, Indonesia

Fred Bavendam / Anemone Hermit Crab (Dardanus pedunculatus) carries Sea Anemones on its shell for protection from predators, Bali, Indonesia

Fred Bavendam / Anemone Hermit Crab (Dardanus pedunculatus) with Sea Anemones on its shell, Manado, North Sulawesi, Indonesia

Juergen Freund / Anemone hermit crab (Dardanus pedunculatus) and anemone. Indo-Pacific Ocean

Juergen Freund / Anemone hermit crab with anemone attached, Indo-Pacific Ocean.

Nature Production / Anemone Hermit Crab {Dardanus pedunculatus} with Sea Anemones {Calliactis polypus} attached, Izu Osezaki, Shizuoka, Japan

Constantinos Petrinos / Anemone Hermit crab {Dardanus pedunculatus} carrying anemone, Sulawesi

Juergen Freund / Anemone hermit crab with anemones on shell {Dardanus pedunculatus} Indo-pacific

Juergen Freund / Anemone hermit crab (Dardanus pedunculatus) with Sea anemones on shell. Indo-pacific