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King crabs being prepared for sale in a water tank.

Zebra shark, Stegostoma fasciatum, also called the leopard shark, is a species of carpet shark and is found throughout the tropical Indo-Pacific.

$Big Blue Octopus Octopus cyanea occurs in the tropical Indo-Pacific from eastern Africa to the Hawaiian Islands in a depth range from 0-150m, max. mantle length 22cm with arms to at least 80 cm. \nBig blue octopuses are found living in muddy, sandy, or rocky bottoms, and in seagrass beds. They create lairs or dens in crevices or coral rubbles within coral reefs. These dens aren't used for long term; on average individuals spend up to 35 days in one den. The average lifespan of big blue octopuses is 12 to 15 months.\nThis juvenile specimen was encountered in the Triton Bay, Indonesia \n3°54'41.052 S 134°7'18.204 E at 12m depth$

Black Sea, Nutrition of Green crab (Carcinus aestuarii), eating another species of crab, which caught at the bottom

This photo was taken in the northwest part of Long island New York in the Wildwood State Park. in the photo there is a dead horseshoe crab that washed up on shore, the exoskeleton makes it seems like it is alive but the interior of the body is empty. horseshoe crabs are one of the oldest in the animal Kingdome to almost not go through any evolutionary changes for around 450 million years.

The Japanese spider crab (Macrocheira kaempferi) is a species of marine crab that lives in the waters around Japan. It has the largest known leg-span of any arthropod.

Underwater image of Nurse shark in the blue ocean of Bimini, The Bahamas

Moon Jelly at Alaska Sea Life Center in Seward, Alaska

Spider crab underwater. Ocean and sea life close-up. Giant Japanese crab is walking along bottom.

A carnivorous freshwater fish that inhabit clear, vegetated lakes, ponds, swamps, and rivers.

Close up of soldier crabs moving along on sand flat on low tide

Black Sea, European flounder (Platichthys flesus luscus) floats in the water column

Grapsus adscensionis on the volcanic rocks in the coast, La Palma

A female Maryland Blue Crab from the Chesapeake Bay walks along a pier after being caught by a fisherman in the late afternoon.

European Green Crab on barnacle encrusted rock

Chiton, Tripoplax regularis. on a rock at Salt Point State Park in Sonoma County, California.

An Angular Roughshark in Marmara Sea in Istanbul

Stock photo showing close-up, elevated view of sand crab scurrying around on compacted wet sand of beach at low tide.

$High-hat Triplefin Enneapterygius tutuilae occurs in the tropical Indo-West Pacific from East Africa to Micronesia, Line Islands, and Society Islands, and Taiwan to Australia, including Papua New Guinea, Line Islands and Society Islands, Taiwan to reefs of Coral Sea and New Caledonia in a depth range from 0-55m, max. length 4cm. Adults are found in various reef habitats, but often on sponges or reef outcrops and in intertidal pools and on corals and rocks. The species feeds on zooplankton. \nEven if it is the most common and most widely distributed among Enneapterygius species, this tiny and well camouflaged fish is rarely encountered. \nTriton Bay, Kaimana Regency, West Papua Province, Indonesia \n3°54'41.0503 S 134°7'18.2052 E at 4m depth$

Free Images: "bestof:Limulus polythemus 2.jpg Horseshoe crab Limulus polyphemus in Prague sea aquarium Czech Republic Mořský svět v Holešovicích own Karelj 2009-03 Limulus"

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Horseshoe crab male on sandy beach limulus polyphemus.jpg

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Pair of mating horseshoe crabs limus polyphemus.jpg

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Melanotaenia boesemani, Mořský svět, Prague, Czech Republic - 20081028.jpg