Georgette Douwma / Hermit Crab. Komodo National Park, Indonesia. October

Stephen Dalton / Rainforest Hermit Crab (Coenobitoidea) hiding in its shell. Seychelles, March.

Pete Oxford / Hermit Crab (Coenobita compressus) pair feeding on Yellow Warbler (Setophaga petechia) carcass, base of Wolf Volcano, Isabella Island, Galapagos Islands, Ecuador

Pete Oxford / Purple Claw Land Hermit (Coenobita clypeatus) on palm trunk, Sian Ka'an Biosphere Reserve, Quintana Roo, Mexico

Bernard Castelein / Red Hermit Crab (Dardanus megistos) with shell, in shallow water, Kizimkazi, Zanzibar, Tanzania

Edwin Giesbers / Land hermit crab (Coenobita rugosus) in spiral seashell on beach, Bako National Park, Sarawak, Borneo, Malaysia

Pete Oxford / Hermit Crab (Coenobita compressus), Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador

Tim Laman / Hermit crab with a shell covered in small sea anemones. Bali Island, Indonesia.

Tim Laman / Hermit crab with a shell covered in small sea anemones. Bali Island, Indonesia.

Sue Daly / Hermit crab (Dardanus sp) Lembeh Straits, Sulawesi, Indonesia

Juergen Freund / Hermit crab {Paguroidea} Great Barrier Reef, Australia

Wild Wonders of Europe / Lundgren / Hermit crab on snail eggs, Norway, February 2009

Wild Wonders of Europe / Lundgren / Two Hermit crabs (Pagurus pubescens) Lofoten, Norway, November 2008

Wild Wonders of Europe / Lundgren / Hermit crab (Pagurus pubescens) on rock, Lofoten, Norway, November 2008

Wild Wonders of Europe / Lundgren / Two Hermit crabs (Pagurus pubescens) Lofoten, Norway, November 2008

Wild Wonders of Europe / Lundgren / Hermit crabs (Pagurus pubescens) about to mate, Lofoten, Norway, November 2008

Juan Carlos Munoz / Hermit crab on beach, Rabida Island, Galapagos, January

Konrad Wothe / Hermit Crab (Paguritta gracilipes) group eating coconut, India

Thomas Marent / Hermit Crab (Paguroidea) on beach, Masoala National Park, Madagascar

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

Thomas Marent / Hermit Crab (Paguroidea) on beach, Cahuita National Park, Costa Rica

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

Ross and Diane Armstrong / Hermit Crab (Paguroidea) on sea floor, Northland, New Zealand

Inaki Relanzon / Land hermit crab {Coenobitoidea} walking across sand, Nosy Tanikeli, near Nosy Be, North Madagascar,

Scott Leslie / Hermit Crab (Paguroidea) on rock, Nova Scotia, Canada

Scott Leslie / Atlantic Sea Raven (Hemitripterus americanus) and Hermit Crabs (Paguroidea) on ocean floor, Nova Scotia, Canada

David Shale / Hermit crab in piece of coral, Barents sea, Northern Europe

David Shale / Hermit crab in piece of coral, Barents sea, Northern Europe

Albert Lleal / Hermit Crab (Dardanus arrosor) using a Sponge (Suberites domuncula) as its home, Mediterranean Sea, Spain

Steven David Miller / Land hermit crab {Isocheles pilosus}, Lady Elliott Island, Great Barrier Reef, Queensland, Australia

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

Nature Production / Two Hermit Crabs {Pagurus filholi} fighting over an empty shell, Japan

Juergen Freund / Hermit crab in cone shell (Paguridae) Pacific/Philippines

Juergen Freund / Hermit crab on soft coral (Paguridae) Pacific Canada

Nature Production / Hermit crab {Pagurus rubrior} changing from smaller to larger shell, sequence 1/3, captive, Japan

Nature Production / Hermit crab {Pagurus rubrior} changing from smaller to larger shell, sequence 2/3, captive, Japan

Nature Production / Hermit crab {Pagurus rubrior} changing from smaller to larger shell, sequence 3/3, captive, Japan

Chris Newbert / Hermit Crab (Dardanus sp) riding on large Hermit Crab (Dardanus sp) which is grabbing a Cone Shell, 60 feet deep, Papua New Guinea

Ingo Arndt / Hermit Crab (Anapagurus laevis) in a snail shell from a Common Northern Whelk (Buccinum undatum) approximate length is nine centimeters, Helgoland, Germany

Ingo Arndt / Hermit Crab (Anapagurus laevis) in a snail shell from a Common Northern Whelk (Buccinum undatum) approximate length is nine centimeters, Helgoland, Germany

Ingo Arndt / Hermit Crab (Anapagurus laevis) in a snail shell from a Common Northern Whelk (Buccinum undatum) approximate length is nine centimeters, Helgoland, Germany

Piotr Naskrecki / Land Snail (Caracolus sp) shell carried by Whitespotted Hermit (Dardanus megistos), Caribbean

Piotr Naskrecki / Hermit Crab (Dardanus sp) emerging from its shell, Hispaniola

Piotr Naskrecki / Hermit Crab (Dardanus sp) emerging from its shell, Hispaniola

Piotr Naskrecki / Hermit Crab (Dardanus sp) emerging from its shell, Hispaniola

Rod Williams / Land hermit crab {Coenobita rugosus} captive, from West Indies

Steven David Miller / Hermit crab, Lady Elliot Is, Australia

Jeff Rotman / Hermit crab close up portrait {Diogenidae} Ustica Islands Italy

Flip Nicklin / Terrestrial Hermit Crab in rainforest, Cocos Island, Costa Rica

Chris Newbert / Hermit Crab (Dardanus sp) crawling on a Nudibranch (Jorunna funebris), Papua New Guinea

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

Chris Newbert / Hermit Crab (Diogenidae), Red Sea, Egypt

Chris Newbert / Left-handed Hermit Crab (Paguristes sp) 30 feet deep, Solomon Islands

Chris Newbert / Right-handed Hermit Crab (Paguritta sp) living in burrow in Stony Coral (Acropora sp) 30 feet deep Solomon Islands

Chris Newbert / Right-handed Hermit Crab (Paguritta sp) living in burrow in Stony Coral (Acropora sp) 30 feet deep, Solomon Islands

Chris Newbert / Left-handed Hermit Crab (Paguristes sp) peering out from a vacated Serpulid Worm hole in the reef surrounded by a Red Encrusting Sponge, Solomon Islands

Chris Newbert / Hermit Crab (Dardanus lagopodes) inside the foot of a Feather Star (Oxycomanthus bennetti) 60 feet deep, Solomon Islands

Chris Newbert / Christmas Tree Worm (Spirobranchus giganteus) and Coral Hermit Crab (Paguritta harmsi) colony, Solomon Islands

Birgitte Wilms / Hermit Crab (Diogenidae) in colorful shell, 40 feet deep, Red Sea, Egypt

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

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

Fred Bavendam / Left-handed Hermit Crab (Strigopagurus strigimanus) with algae-covered shell, Hobart, Tasmania, Australia

Fred Bavendam / Whitespotted Hermit (Dardanus megistos) living in a shell, Manado, North Sulawesi, Indonesia

Flip Nicklin / Hermit Crab, Hawaii

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

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

Steven David Miller / Hermit crab hunting on beach at night. Great Barrier Reef Lady Elliot Island, Australia

Steven David Miller / Hermit crab hunting on beach at night. Great Barrier Reef, Queensland, Australia

Steven David Miller / Hermit crab living in tritan shell, underwater at night, Great Barrier Reef, Lady Elliot Island, Australia

Jeff Rotman / Hermit crab. Ustica Island, Italy Mediterranean

Gary Bell/ Oceanwide / Hermit Crab (Dardanus lagopodes) female carrying eggs, Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Anemone Hermit Crab (Dardanus pedunculatus) covered with sea anemones used for camouflage, Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Hermit Crab (Dardanus lagopodes), Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Hermit Crab (Dardanus lagopodes), Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Hermit Crab (Dardanus guttatus), Bali, Indonesia

Gary Bell/ Oceanwide / Hermit Crab (Dardanus lagopodes), Great Barrier Reef, Australia

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

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

Ingo Arndt / Hermit Crab (Anapagurus laevis) in a snail shell from a Common Northern Whelk (Buccinum undatum) approximate length is nine centimeters, Helgoland, Germany

Piotr Naskrecki / Hermit Crab (Dardanus sp) emerging from its shell, Hispaniola

Piotr Naskrecki / Hermit Crab (Dardanus sp) emerging from its shell, Hispaniola

Piotr Naskrecki / Hermit Crab (Dardanus sp) emerging from its shell, Hispaniola

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

Pete Oxford / Hermit crabs {Coenibita rugosus} + {C phaeton} feed on Red-tailed tropic bird

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

Miles Barton / Land hermit crabs {Coenobitidae} feed on Giant tortoise dung, Aldabra,

Sue Daly / Hermit crab {Pagurus prideauxi} Jersey Channel Isles UK Bouley bay

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

Lewis Jefferies / Common hermit crab (Pagurus bernhardus) in Painted topshell, resting on Golden kelp (Laminaria ochroleuca) frond, encrusted with Lacy crust bryozoans (Membranipora membranacea), Lizard Peninsula, Corn...

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

Alex Mustard / Coral hermit crab (Paguritta sp.) peering out from its hole in a coral reef, Bitung, North Sulawesi, Indonesia, Lembeh Strait.

Alex Mustard / Maroon hermit crab (Pagurus hemphilli) with hitchhiking snails on its shell, portrait, Browning Pass, Vancouver Island, British Columbia, Canada, Queen Charlotte Strait, Pacific Ocean.

David Tipling / Horned ghost crab (Ocypode ceratophthalmus) predating on a Hermit crab, Wizard Island Cosmoledo Atoll, Seychelles.