Constantinos Petrinos / Red hermit crab {Dardanus megistos} Sulawesi, Indonesia

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

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

Constantinos Petrinos / Spotted hermit crab (Dardanus megistos) running at night and stirring up sand. Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / White-spotted hermit crab (Dardanus megistos) Mabul, Malaysia.

Georgette Douwma / White spotted hermit crab (Dardanus megistos) Lembeh Strait, Sulawesi, Indonesia.

Pascal Kobeh / White spot hermit crab (Dardanus megistos) at night, Maldives. Indian Ocean.

Claudio Contreras / White-spotted Hermit Crab (Dardanus megistos), Batasan Island, Danajon Bank, Central Visayas, Philippines, April

Juergen Freund / Hermit crab (Dardanus megistos) on sandy bottom. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Red hermit crab (Dardanus megistos) on sandy bottom. Lembeh Strait, Sulawesi, Indonesia

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

Sue Daly / Red hermit crab (Dardanus megistos) Lembeh Straits, Sulawesi, Indonesia

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

Doug Perrine / Red hermit crab {Dardanus megistos} Ko Bon, Thailand

GEORGETTE DOUWMA / Red hermit crab (Dardanus megistos) using a Grey bonnet / helmet shell (Phalium glaucum) as a home. Lembeh Strait, North Sulawesi, Indonesia

GEORGETTE DOUWMA / Red hermit crab (Dardanus megistos) using a Grey bonnet / helmet shell (Phalium glaucum) as a home. Lembeh Strait, North Sulawesi, Indonesia

Brent Hedges / Red hermit crab {Dardanus megistos} close-up, Solomon Islands, South Pacific

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

Constantinos Petrinos / Large hermit crab {Dardanus megistos} Sulawesi, Indonesia

Constantinos Petrinos / Red hermit crab, Sulawesi, Indonesia.

Jane Burton / Hermit crab (Dardanus megistos) portrait, captive

Jane Burton / Hermit crab (Dardanus megistos) feeding on fish head, captive

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

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

Joel Sartore / Photo Ark / White-spotted hermit crab (Dardanus megistos) emerging from its shell before walking out of frame, Riverbanks Zoo. Captive.