Octopods Nautilids Cuttlefishes Squids and Relatives: Cephalopoda - Physical Characteristics, Behavior And Reproduction, Cephalopods And People, Longfin Inshore Squid (loligo Pealeii): Species Accounts - GEOGRAPHIC RANGE, HABITAT, DIET, CONSERVATION STATU
found nautilus octopus
Cephalopods are found in all of the world's oceans.
Cephalopods are found in tide pools, on sea bottoms, and swimming in open water. They live at depths of 16,400 feet (5,000 meters) or more.
Most cephalopods prey on fishes, crustaceans, and mollusks, including other cephalopods. However, nautiluses and their relatives scavenge dead animals.
No species of cephalopods are considered threatened or endangered.
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The bodies of all cephalopods (SEF-oh-lo-pahd) remain firm thanks to a system of muscles that maintain fluid pressure inside. Their bodies are more or less divided into three regions: the armlike tentacles surrounding the mouth; the head that has a pair of large, distinctive eyes, one on each side; and the body, or mantle, sometimes with a pair of fins on the sides. Some species, like nautiluses, …
Cephalopods have large brains, well-developed eyes, and complex behaviors. Some species, such as octopuses, lead solitary lives, while others, like cuttlefish, live in small to very large groups called schools. Some cuttlefishes or squids get together only to find a mate and reproduce. Many species live at depths of 1,310 to 3,280 feet (400 to 1,000 meters) during the day and swim closer to the su…
For hundreds of years, cephalopods have appeared in the art and literature of many human cultures around the world. Today they are sometimes featured in science fiction books and films as "sea monsters." Stories of giant squids washed up on the beach or captured in fishing nets sometimes dominate the news. In 2000, about 4.0 million tons (3.6 million metric tons) of cephalopods were …
Physical characteristics: The mantle is of variable color with brown, red, purplish, and yellow speckles. It is cylinder-shaped, tapered toward the rear, and measures about 17 inches (430 millimeters) long, and 3.62 inches (92 millimeters) wide. The head has a large pair of eyes that are covered by a clear membrane. The eight tentacles are about half the length of the mantle, while the pair of ten…
Physical characteristics: The pearly nautilus lives inside a coiled, snaillike shell that has a distinctive flame-striped color pattern. The shell is divided internally into a series of chambers. Geographic range: This species is found in the Indo-West Pacific. Habitat: They prefer to live in habitats with a hard ocean bottom, especially among coral reefs. They swim down to depths of about 2,460 f…
Physical characteristics: The mantle plus the longest tentacle is about 120 inches (3 meters) long. The ball-shaped mantle is variable in color but usually reddish brown. The skin is smooth but may temporarily have bumps of different sizes and shapes. The thick, armlike tentacles are four times the length of the mantle and have two alternating rows of suckers. The head is nearly as wide as the man…
Physical characteristics: This squid's skin has many light-producing organs. There are large, circular light-producing organs just behind the fins on the mantle. The tentaclelike arms are covered by tiny, hairlike structures called cirri (SIH-ree). The arms have suckers only on the outer halves. Geographic range: This species is found in all cool and warm water oceans. Habitat: Vampire squi…
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