Sue Daly / Anemone hermit crab (Pagurus prideaux) getting into a shell, with a Cloak anemone (Adamsia palliata), Sark, British Channel Islands, UK, June.

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

David Hall / Anemone hermit crab (Dardanus pedunculatus) carrying Anemones (Calliactis polypus) on shell. Mutualism in which anemones are transported to new feeding opportunities whilst providing camouflage and de...

Magnus Lundgren / Wild Wonders of China / Anemone hermit crab (Dardanus pedunculatus) Xiaoliuqiu Island, Taiwan

Pascal Kobeh / Coral hermit crab (Dardanus pedunculatus) with sea anemones on its shell - the anemones get better feeding opportunities from extra mobility, the crab gains extra protection. Sulu Sea, Philippines.

Pascal Kobeh / Coral hermit crab (Dardanus pedunculatus) with sea anemones on its shell - the anemones get better feeding opportunities from extra mobility, the crab gains extra protection. Sulu Sea, Philippines. Me...

David Fleetham / Hermit crab (Dardanus pedunculatus) with Sea anemones (Calliactis polypus) for protection. Tulamben, Bali, Indonesia.

David Fleetham / White spotted hermit crab (Dardanus megistos) amongst coral. Kauai, Hawaii.

Sue Daly / Hermit crab (Pagurus prideaux) and Cloak anemone (Adamsia carciniopados), Trondheimsfjord, Norway, July.

Constantinos Petrinos / Anemone hermit crab (Dardanus pedunculatus) on mooring line carrying sea anemones. Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Anemone hermit crab (Dardanus pedunculatus) on mooring line carrying sea anemones. Lembeh Strait, North Sulawesi, Indonesia