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Crustacean Meaning and Definition in Dictionary

Definitions from Wordnet 2.0

  • any mainly aquatic arthropod usually having a segmented body and chitinous exoskeleton
  • of or belonging to the class Crustacea

Definitions from Wiktionary

  • any mainly aquatic arthropod usually having a segmented body and chitinous exoskeleton

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Crustacean Meaning and Definition in Wikipedia

The Crustacea are a subphylum of arthropods with 50,000 described species. They are part of the phylum Arthropoda. Crustaceans include crabs, lobsters, crayfish, shrimp, krill and barnacles. They are relatives of insects. If the Arthropods are regarded as a superphylum, then the insects and crustaces would be phyla. (see List of animal phyla). The group has an extensive fossil record, reaching back to the Cambrian.

Most crustaceans are aquatic, mostly marine. Some have moved onto land permanently. Crustaceans that live on land include some crabs, and woodlice. Crustacea range in size from a parasite 0.1mm long, to the Japanese spider crab with a leg span of up to 14ft (4.3 m) and a mass of 44lb (20kg). The North Atlantic lobster can weigh more than 40 pounds.

Most crustaceans are mobile, but some become sessile after their larval stage. Barnacles become attached to rocks on thesea shore. Some are parasitic, like fish lice, and tongue worms. Crustacea usually have separate sexes, and the eggs hatch into larvae.

Crustacean Sample Sentences in News

  • Seaweed engineers build crustacean homes; old forests store new nitrogen
    ( Ecological Society of America ) In this month's issue of Ecology, invasive seaweed shelters native crustaceans, mature forests store nitrogen in soil, and stream invertebrates aren't eating what we thought they were eating. Read more on this news related to 'Crustacean'
  • Kylie Jenner & Tyga Have Dinner At Crustacean
    Kylie Jenner and rapper Tyga spotted out for an early dinner at Crustacean in Beverly Hills, California on October 14, 2014. The pair came out separately with Kylie trying to… READ ON Read more on this news related to 'Crustacean'
  • Crabzilla or Bizarre Sand Formation? 'Giant Crustacean' Snapped at Whitstable Harbour
    Is this Britain's biggest crab spotted at Whitstable harbour? Or the most unusual sand formation you have ever seen? Read more on this news related to 'Crustacean'

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