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

MYN / Les Meade / Hairy Hermit Crab (Pagurus hirsutiusculus) Meadowdale Beach, Puget Sound, Snomish County, Washington, June, meetyourneighbours.net project

Jeff Rotman / Hairy hermit crab (Aniculus elegans) camouflaged on coral reef, Tagus Cove, Galapagos Islands, Pacific Ocean.

Scott Leslie / Hairy Hermit Crab (Pagurus arcuatus) portrait, Nova Scotia, Canada

Doug Perrine / Hairy hermit crab {Aniculus elegans} Galapagos

Chris Newbert / Hairy Yellow Hermit (Aniculus maximus) carrying a broken shell as a protective home, Kona, Hawaii

Norbert Wu / Hairy Yellow Hermit (Aniculus maximus) uses discarded shells for its homes, Palau

Jeff Rotman / Hairy hermit crab {Aniculus elegans} camouflaged on coral reef at night, Galapagos

David Fleetham / Hermit crab (Aniculus maximus), living in a Partridge tun shell (Tonna perdix), Hawaii.

David Fleetham / Hermit crab (Aniculus maximus), using a Triton's trumpet shell (Charonia tritonis) for a home, Hawaii.

Roberto Rinaldi / Hermit crab (aniculus maximus) in its shell, Palau, Micronesia.

Chris Newbert / Hairy Yellow Hermit (Aniculus maximus) 50 feet deep, Hawaii

David Fleetham / Hairy netted hermit crab (Aniculus retipes) resting on coral reef, Yap, Federated States of Micronesia, Pacific Ocean.

Joel Sartore / Photo Ark / Hairy hermit crab (Pagurus hirsutiusculus) portrait, East Bay Regional Parks Mobile Education Program. Captive, from San Francisco Bay, California, USA.

David Fleetham / Hairy yellow hermit crab / Large hairy hermit crab (Aniculus maximus) in a Triton trumpet shell (Charonia tritonis), Hawaii, Pacific Ocean.

David Fleetham / White-spotted hermit crab (Dardanus megistos) portrait, Philippines, Pacific Ocean.

Joel Sartore / Photo Ark / Hairy hermit crab (Pagurus hirsutiusculus) portrait, John Ball Zoo. Captive.

Joel Sartore / Photo Ark / Hairy hermit crab (Pagurus hirsutiusculus) portrait, John Ball Zoo. Captive.

David Fleetham / Hairy yellow hermit crab (Aniculus maximus) in its home of a Triton trumpet shell (Charonia tritonis), Hawaii, Pacific Ocean.

David Fleetham / Close up of a Hairy yellow hermit crab (Aniculus maximus), Hawaii.