Alex Mustard / Pederson cleaner shrimp (Periclimenes pedersoni) cleaning the eye of a Nassau grouper (Epinephelus striatus), Bloody Bay Wall, Little Cayman, Cayman Islands. British West Indies, Caribbean Sea.

Juergen Freund / Blue starfish shrimp (Periclimenes soror) on starfish, Kimbe Bay, Papua New Guinea, Indo-Pacific.

Fred Bavendam / Scarlet Cleaner Shrimp (Lysmata amboinensis) working on a Tomato Grouper (Cephalopholis sonnerati), Milne Bay, Papua New Guinea

Gary Bell/ Oceanwide / Jellyfish, shrimp and crustaceans at night, Milne Bay, Papua New Guinea

Gary Bell/ Oceanwide / Jellyfish, shrimp and crustaceans at night, Milne Bay, Papua New Guinea

Gary Bell/ Oceanwide / Tyron's Risbecia (Risbecia tryoni) with commensal Emperor Shrimp (Periclimenes imperator), Milne Bay, Papua New Guinea

Gary Bell/ Oceanwide / Tyron's Risbecia (Risbecia tryoni) with commensal Emperor Shrimp (Periclimenes imperator), Milne Bay, Papua New Guinea

Ashley Cooper / Shrimp fishermen's trailers inundated by flood water during an exceptionally high tide near Cark in Cartmell on Morecambe Bay, Cumbria, England, UK. February 2014

Georgette Douwma / Coleman's coral shrimp (Vir colemani) Triton Bay, Indonesia.

Linda Pitkin / Banded tozeuma shrimp (Tozeuma armatum) on Black Coral (Antipathes sp.), Triton Bay, near Kaimana, West Papua, Indonesia

Linda Pitkin / Banded tozeuma shrimp (Tozeuma armatum) on Black Coral (Antipathes sp.), Triton Bay, near Kaimana, West Papua, Indonesia

Alex Mustard / Zanzibar whip coral shrimp (Dasycaris zanzibarica) on whip coral. Ambon Bay, Ambon, Maluku Archipelago, Indonesia. Banda Sea, tropical west Pacific Ocean.

Bert Willaert / Magnificent shrimp (Ancylomenes magnificus), Kimbe Bay, West New Britain, Papua New Guinea

Bert Willaert / Magnificent shrimp (Ancylomenes magnificus), Kimbe Bay, West New Britain, Papua New Guinea

Bert Willaert / Steinitz' Shrimp goby (Amblyeleotris steinitzi), Kimbe Bay, West New Britain, Papua New Guinea

Bert Willaert / Peacock mantis shrimp (Odontodactylus scyllarus), Kimbe Bay, West New Britain, Papua New Guinea

Linda Pitkin / Coleman shrimp (Periclimenes colemani) on Fire urchin (Asthenosoma ijimai). Aljui Bay, Raja Ampat, West Papua, Indonesia.

Tony Wu / Red-margin shrimp goby (Amblyeleotris rubrimarginatus) Bootless Bay, Papua New Guinea

Tony Wu / Yellow shrimp goby (Cryptocentrus cinctus) Waga Waga in Milne Bay, Papua New Guinea

Pete Oxford / Gold-barred Shrimp-goby (Amblyeleotris randalli), Cenderawasih Bay, West Papua, Indonesia

Alex Mustard / Pederson cleaner shrimp (Periclimenes pedersoni) hovering above a coral reef, beating its antennae, hoping to attract a fish to clean. This shrimp is carrying eggs. Bloody Bay Wall, Little Cayman, Cay...

Juergen Freund / Peacock Mantis Shrimp (Odontodactylus scyllarus) Kimbe Bay, West New Britain, Papua New Guinea.

Alex Hyde / Brown / Common Shrimp (Crangon crangon) camouflaged in sand. Isle of Mull, Scotland, UK. June.

Alex Hyde / Brown / Common Shrimp (Crangon crangon) showing close up of reflecting superposition compound eyes. Isle of Mull, Scotland, UK. June.

Sue Daly / Common Prawn (Palaemon serratus) Bouley Bay, Jersey, British Channel Islands.

Sue Daly / Common Prawn (Palaemon serratus) Bouley Bay, Jersey, British Channel Islands.

Alex Mustard / High magnification portrait of Tiny hairy shrimp (Phycocaris simulans) with eggs, backlit. Secret Bay, Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.

Gerrit Vyn / Natural gas platform and Shrimp boat skimmer in Mobile Bay. Baldwin County, Alabama. USA, June.

Doug Perrine / Randall's shrimp goby {Amblyeleotris randalli} shares burrow with blind Shrimp {Alpheus sp} which it provides protection to, symbiosis, Kimbe Bay, Papua New Guinea

Fred Bavendam / Scarlet Cleaner Shrimp (Lysmata amboinensis) working on a Tomato Grouper (Cephalopholis sonnerati), Milne Bay, Papua New Guinea

Fred Bavendam / Coleman's Shrimp (Periclimenes colemani) pair living among the spines of a Fire Urchin (Asthenosoma varium), Milne Bay, Papua New Guinea

Fred Bavendam / Coleman's Shrimp (Periclimenes colemani) pair living among the spines of a Fire Urchin (Asthenosoma varium), Milne Bay, Papua New Guinea

Fred Bavendam / Shrimp (Periclimenes sp) with similar coloration to that of its crinoid host, Milne Bay, Papua New Guinea

Flip Nicklin / Bay Ghost Shrimp (Neotrypaea californiensis) food for Gray Whales, found in muddy pits in shallow areas where whales filter food from the mud, Clayoquot Sound, Vancouver Island, British Columbia, Cana...

Flip Nicklin / Bay Ghost Shrimp (Neotrypaea californiensis) food for Gray Whales, found in muddy pits in shallow bottom areas where whales filter food from the mud, Clayoquot Sound, Vancouver Island, British Columbi...

Fred Bavendam / Black Coral Shrimp (Pontonides unciger) living on a black Coral Sea whip (Cirripathes sp), Milne Bay, Papua New Guinea

Brent Hedges / Banded coral shrimp, Milne Bay, Papua New Guinea.

Gary Bell/ Oceanwide / Jellyfish, shrimp and crustaceans at night, Milne Bay, Papua New Guinea

Gary Bell/ Oceanwide / Blue Coral Banded Shrimp (Stenopus tenuirostris) and Radar Shrimp (Lysiosquillina sp), Milne Bay, Papua New Guinea

Gary Bell/ Oceanwide / Palaemonid Shrimp (Palaemonidae) camouflaged on sponge, Milne Bay, Papua New Guinea

Joel Sartore / Photo Ark / California skeleton shrimp (Caprella californica) portrait, East Bay Regional Parks Mobile Education Program. Captive, from San Francisco Bay, California, USA.

Joel Sartore / Photo Ark / Bay ghost shrimp (Neotrypaea californiensis) female, with eggs, portrait, East Bay Regional Parks Mobile Education Program. Captive, from San Francisco Bay, California, USA.

Joel Sartore / Photo Ark / Bay ghost shrimps (Neotrypaea californiensis) pair, male on left, portrait, East Bay Regional Parks Mobile Education Program. Captive, from San Francisco Bay, Californai. USA.

Joel Sartore / Photo Ark / Bay ghost shrimp (Neotrypaea californiensis) male, portrait, East Bay Regional Parks Mobile Education Program. Captive, from San Francisco Bay, California, USA.

Shane Gross / Armed hermit crab (Pagurus armatus) feeding on a shrimp and its eggs, Nanoose Bay, Vancouver Island, British Columbia, Canada, Pacific Ocean.

Magnus Lundgren / Cleaning shrimp (Periclimenes sp,) on a coral reef, close up, Triton Bay, West Papua, Indonesia, Pacific Ocean.

Magnus Lundgren / Zebra mantis shrimp (Lysiosquillina maculata) hunting on the surface at night, Triton Bay, West Papua, Indonesia, Pacific Ocean.

Magnus Lundgren / Cleaning shrimp sitting on the snout of Leopard moray eel (Gymnothorax favagineus), Triton Bay, West Papua, Indonesia, Pacific Ocean.

Magnus Lundgren / Bubble coral shimp (Vir philippinensis) full of eggs, resting in Bubble coral (Plerogyra sinuosa), Triton Bay, West Papua, Indonesia, Pacific Ocean.

Magnus Lundgren / Pelagic prawn (Funchalia taaningi) hiding in a pink colony of Pyrosomes (Pyrosomatidae), free-floating colonial tunicates that usually live in the open warm ocean. Balayan Bay, off Anilao, Batangas, P...

Magnus Lundgren / Larval mantis shrimp (Alima sp) Balayan Bay, off Anilao, Batangas, Philippines, Pacific Ocean

Magnus Lundgren / Japanese mantis shrimp (Oratosquilla oratoria) a Western Pacific species. Balayan Bay, off Anilao, Batangas, Philippines, Pacific Ocean

Magnus Lundgren / Japanese mantis shrimp (Oratosquilla oratoria) Balayan Bay, off Anilao, Batangas, Philippines, Pacific Ocean.

Magnus Lundgren / Shrimp (Oxycephalus clausi) riding on top of colony of salps (Cyclosalpa) a marine tunicate in the class Thaliacea. It is found floating in the open sea in the Indo-Pacific region. Balayan Bay, off An...

Magnus Lundgren / Mantis shrimp (Squilloidea sp) juvenile in Balayan Bay, off Anilao, Batangas, Philippines, Pacific Ocean

Magnus Lundgren / Larval Banded coral shrimp (Stenopus hispidus) in a plankton close to the surface at night.Balayan Bay, off Anilao, Batangas, Philippines, Pacific Ocean

Franco Banfi / Live chocolate clams and fresh shrimp served with lemon, Puerto San Carlos, a fishing community facing the Pacific Ocean. Magdalena Bay, Baja California, Mexico.

David Hall / Red-gilled aeolid nudibranch (Flabellina triophina) moving among Skeleton shrimp (Caprella sp.) The nudibranch does not prey upon amphipods; it eats stinging hydroids. Gambier Bay, Admiralty Island, A...

David Hall / Clown nudibranch (Triopha catalinae) grazing on Lace bryozoans (Membranipora serrilamella) surrounded by several caprellid amphipods, also known as 'skeleton shrimps' (Caprella sp.); Gambier B...

Magnus Lundgren / Sexy shrimp / squat shrimp (Thor amboinensis) Balayan Bay, Batangas, the Philippines.

Magnus Lundgren / Tiny shrimp sitting in a colony of common salp, (Salpa fusiformis), the most widespread species of salp, Balayan Bay, off Anilao, Batangas, Philippines, Pacific Ocean.

Magnus Lundgren / Zebra mantis shrimp (Lysiosquillina maculata) photographed at night, Triton Bay, Papua Barat, Indonesia. Magnus

Shane Gross / Marbled shrimp (Saron marmoratus) on coral at night, Kimbe Bay, Papua New Guinea.

Shane Gross / Xenia shrimp (Hippolyte commensalis) perfectly camouflaged on its Xenia soft coral host. Kimbe Bay, Papua New Guinea

Shane Gross / Marbled Shrimp (Saron marmoratus) portrait at night, Kimbe Bay, Papua New Guinea.

Philippe Clement / Shrimpers sorting catch from shrimp drag net / dragnet on the beach caught along the North Sea coast at dusk, Belgium. June

Philippe Clement / Shrimper sorting catch from shrimp drag net on the beach caught along the North Sea coast, Belgium. June

Philippe Clement / Shrimper's catch from shrimp drag net on the beach showing shrimps, crabs and fish like sole, lesser weever, mackerel caught along the North Sea coast, Belgium. June