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

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...

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

Sue Daly / Common hermit crab (Pagurus bernhardus), Sark, British Channel Islands, UK, June.

Sue Daly / Common hermit crab (Pagurus bernhardus) Sark, British Channel Islands, UK, June.

Sue Daly / Common hermit crab (Pagurus bernhardus), Sark, British Channel Islands, UK, June.

Sue Daly / Common hermit crab (Pagurus bernhardus) with a Parasitic anemone (Calliactis parasitica) in its shell, Sark, British Channel Islands, UK, June.

Sue Daly / Anemone Hermit Crab (Pagurus prideaux) with Cloak Anemone (Adamsia palliata) and Parasitic Anemone (Calliactis parasitica) Bouley Bay, Jersey, British Channel Islands.

Alex Mustard / Hermit crab (Dardanus calidus) with hermit crab anemone's (Calliactis parasitica) attached to its shell. This anemone lives exclusively on the shells of hermit crabs. Tavolara Marine Protected Area, O...

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

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

Sue Daly / Parasitic anemone (Calliactis parasitica) Bouley Bay, Jersey, Channel Islands, UK