Juergen Freund / Coleman shrimp (Periclimenes colemani) on a Fire urchin (Asthenosoma varium) Moluccas Islands, Indonesia.

Juergen Freund / Anemone crab {Neopetrolisthes ohshimai} in sea anemone, Indo Pacific

Jeff Rotman / Emperor Shrimp (Periclimenes imperator / Zenopontonia rex) living inside gills of Spanish Dancer Nudibranch (Hexabranchus sanguineus). Egypt, Red Sea.

Jeff Rotman / Symbiotic commensal Emperor shrimp (Periclimenes imperator / Zenopontonia rex) living inside the gills of a Spanish dancer nudibranch (Hexabranchus sp), Red Sea, Egypt

Juergen Freund / Anemone hermit crab (Dardanus pedunculatus) with anemone on its shell, walking on the sandy sea bed. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Fimbriated moray eel (Gymnothorax fimbriatus) with a cleaner shrimp. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Pacific clown anemone shrimp (Periclimenes brevicarpalis), a commensal shrimp found on sea anemones. Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Mushroom coral ghost shrimps / Anemone shrimps (Periclimenes kororensis), always found in association with mushroom corals (Heliofungia sp.) or sea anemones. Lembeh Strait, North Sulawesi, Indonesia

Juergen Freund / Fimbriated moray eel (Gymnothorax fimbriatus) with a cleaner shrimp. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Soft coral crab / Dendronephthya crab (Hoplophrys oatesii) camouflaged on the tip of soft coral, Indo-pacific

Juergen Freund / Soft coral crab / Dendronephthya crab (Hoplophrys oatesii) camouflaged on the tip of a soft coral, Indo-pacific

Juergen Freund / Anemone crab {Neopetrolisthes ohshimai} in sea anemone, Indo Pacific