Pair of Emperor Shrimp, Periclimenes imperator, Ambon, Moluccas, Indonesia

Pair of Squat Shrimps, Thor amboinensis, Triton Bay, West Papua, Indonesia

Squat Shrimp, Thor amboinensis, Triton Bay, West Papua, Indonesia

Orang Utan Spider Crab, Achaeus japonicus, Ambon, Moluccas, Indonesia

Colored Squat Lobster, Neomunida olivarae, Kai Islands, Moluccas, Indonesia

Commensal Shrimp associated with Starfish, Periclimenes soror, Ambon, Moluccas, Indonesia

Pair of Emperor Shrimp, Periclimenes imperator, Ambon, Moluccas, Indonesia

Conic Spider Crab, Xenocarcinus conicus, Kai Islands, Moluccas, Indonesia

Porcelain Crab associated with Sea Anemone, Neopetrolisthes maculatus, Ambon, Moluccas, Indonesia

Pair of Emperor Shrimp, Periclimenes imperator, Ambon, Moluccas, Indonesia

Pair of Squat Shrimps, Thor amboinensis, Triton Bay, West Papua, Indonesia

Spider Crab covered with Anemones, Cyclocoeloma tuberculata, Ambon, Moluccas, Indonesia

Pair of Emperor Shrimp, Periclimenes imperator, Ambon, Moluccas, Indonesia

Small Sponge Crab, Dromia dormia, Kai Islands, Moluccas, Indonesia

Bug-eye Squat Lobster (Neomunida olivarae), also known as a colored squat lobster or the google-eyed fairy crab, Dumaguete, Philippines

A Slender Spongegoby (Phyllogobius platycephalops) and two different species of crabs. Attached to the goby are several parasites with egg cases, that will likely prove fatal over time. Many species live on the convuluted surface of this sponge, Philippin

Both a Crinoid Commensal Shrimp (Periclimenes cornutus) and a Crinoid Squat Lobster (Allogalathea elegans) on a crinoid. These tiny crustaceans are commensal on crinoids or feather stars and take their color from the host, Philippines

An Imperial commensal shrimp (Periclimenes imperator), photographed at night on the Spanish dancer nudibranch (Hexabranchus sanguineus), that it calls home, Philippines

This soft coral crab or candy crab (Hoplophrys oatesii), is wearing a decoration of soft coral polyps on top of head as camouflage, Dumaguete, Philippines

Wire coral goby (Bryaninops yongei) on wire coral (Cirrhipathes sp.), a relative of black coral.

The dragon shrimp (Miropandalus hardingi) on whip coral, is also known as a gorgonian sandaled shrimp, Philippines

Male and female porcelain crabs (Neopetrolisthes maculatus) are commensal in sea anemones, Philippines

Symbiotic between Randalls Prawn-Goby and Pistol Shrimp, Amblyeleotris randalli, Alpheus rapicida, Turtle Cove, Micronesia, Palau

Anemone Shrimp and Clown Anemonefish, Periclimenes tosaensis, Amphiprion ocellaris, Raja Ampat, West Papua, Indonesia

Porcelain Crab in Soft Coral, Pocellanella triloba, Raja Ampat, West Papua, Indonesia

Commensal Shrimp in Sponge, Periclimenes cf. tenuipes, Raja Ampat, West Papua, Indonesia

Commensal Shrimp in Coral Polyps, Periclimenes psamathe, Raja Ampat, West Papua, Indonesia

Reef Spider Crab, Mithrax spinosissimus, Cozumel, Caribbean Sea, Mexico

Anemone Comensal Shrimp, Periclimenes tosaensis, Raja Ampat, West Papua, Indonesia

Bubble Coral Shrimp, Vir philippinensis, Plerogyra sinuosa, Raja Ampat, West Papua, Indonesia