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

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

Sue Daly / Anemone hermit crab (Pagurus prideaux) attacking another, with Cloak anemones (Adamsia palliata) covering both their shells, Sark, British Channel Islands, UK, October.

Sue Daly / Anemone hermit crab (Pagurus prideaux) sifting gravel on the seabed for food, with a Cloak anemone (Adamsia palliata) covering its shell, Sark, British Channel Islands, UK, October.

SCOTLAND: The Big Picture / Hermit crab (Pagurus prideauxi) with Cloak anemone (Adamsia palliata) on shell, South Arran Marine Protected Area, Isle of Arran, Scotland, UK, August.

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

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

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

Lewis Jefferies / Hermit crab (Pagurus prideaux) with symbiotic Cloak anemone (Adamsia Pallaita) feeding amongst Common eelgrass (Zostera marina) meadow, Helford River Estuary, Cornwall, UK, May.

Alex Mustard / Anemone hermit crab (Pagurus prideaux) carrying an anemone (Adamsia palliata) digs in the sand at the base of a bed of common brittlestars (Ophiothrix fragilis). Fort William, Lochaber, The Highlands,...