Clawed lobsters should not be confused with spiny lobsters, which have no claws (chelae), and are not closely related. The closest relatives of clawed lobsters are the reef lobster Enoplometopus and the three families of freshwater crayfish.
Smaller varieties are sometimes called "lobsterettes". Lobsters are invertebrates, and have a tough exoskeleton, which protects them. Like most arthropods, lobsters must molt in order to grow, leaving them vulnerable during this time.
Lobsters live on rocky, sandy, or muddy bottoms from the shoreline to beyond the edge of the continental shelf. They generally live singly in crevices or in burrows under rocks.
Although many studies suggested that lobsters are primarily scavengers [citation needed], feeding on molluscs and decaying animal matter, recent studies have shown that they primarily feed on live fish, dig for clams, sea urchins, and feed on algae and eel-grass. They occasionally eat other lobsters, too. An average adult lobster is about 230 mm (9 inches) long and weighs 700 to 900 g (1.5 to 2 pounds). Lobsters grow throughout their lives and are long-lived. They can thus reach impressive sizes. According to the Guinness World Records, the largest lobster was caught in Nova Scotia, Canada and weighed 20.14 kg (44.4 lb).
Being arthropods, lobsters are largely bilaterally symmetrical; clawed lobsters often possess unequal, specialized claws, like the king crab. A freshly caught lobster will have a claw that is full and fleshy, not atrophied. The anatomy of the lobster includes the cephalothorax which is the head fused with the thorax, both of which are covered by the carapace, and the abdomen. The lobster's head consists of antennae, antennules, mandibles, the first and second maxillae, and the first, second, and third maxillipeds. Because a lobster lives in a murky environment at the bottom of the ocean, its vision is poor and it mostly uses its antennae as sensors. Studies have shown that the lobster eye is formed with a reflective structure atop a convex retina. In contrast, most complex eyes use refractive ray concentrators (lenses) and a concave retina. The abdomen of the lobster includes swimmerets and its tail is composed of uropods and the telson.
In general, lobsters move slowly by walking on the bottom of the seafloor. However, when they are in danger and need to flee, they swim backwards quickly by curling and uncurling their abdomen. A speed of 5 meters per second has been recorded.
2006-08-31 20:16:29
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answer #1
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answered by Anonymous
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Do yhey have eyes to look? They do have pinchers. It is too bad that they do not attack those who cook and eat them. I used to love lobster until I found out that they are put in boiling water, alive. Poor things.
2006-08-31 20:11:39
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answer #2
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answered by doglas p 3
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Hey "D",
With the two eyes on the top of his wittle bitty head!
James in San Diego
2006-08-31 20:07:13
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answer #3
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answered by jpr_sd 4
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go to
http://www.vifishandwildlife.com/Education/FactSheet/PDF_Docs/14Lobster.pdf
there's an image and description there.
or
just type 'lobster' at google image
2006-08-31 20:36:45
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answer #4
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answered by time-OUT 4
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