Crustacean

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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


  • Crustacean shells rival plastics for keeping food fresh: study
    By Chris Arsenault ROME (Thomson Reuters Foundation) - Packaging made from recycled crustacean shells could reduce the need for plastic wrappings to preserve fresh vegetables, reduce oil consumption and give food a longer shelf-life, a Spanish study said. Chitosan, a bioplastic made by isolating organic matter from shrimp shells, helped preserve the shelf-life of Read more on this news related to 'Crustacean'
  • Crustacean found near planned Purple Line route not endangered, AU scientist says
    Opponents of Purple Linel project say they?ll keep searching for endangered amphipod?s DNA in Rock Creek Park. Read more on this news related to 'Crustacean'
  • Better Than Plastic? Recycled Crustacean Shells New Alternative for Food Packaging
    Better Than Plastic? Recycled Crustacean Shells New Alternative for Food Packaging Read more on this news related to 'Crustacean'

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