Crustacean Meaning and Definition in Dictionary
adj : of or belonging to the class Crustacea [syn: crustaceous]
n : any mainly aquatic arthropod usually having a segmented body
and chitinous exoskeleton
- Crustacean \Crus*ta"cean\ (kr?s-t?"shan; 97), a. (Zo["o]l.)
Of or pertaining to the Crustacea; crustaceous. -- n. An
animal belonging to the class Crustacea.
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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.[See more about Crustacean at Dictionary 3.0 Encyclopedia]
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Crustacean Sample Sentences in News
- Where have all the codfish gone? Research suggests food source loss has contributed
The mega-decline in cod and other fisheries across the North Atlantic Ocean threatens the livelihood of fishermen and communities in New England and Atlantic Canada. One suspect in the disappearance of cod and other groundfish is the food source for their young: a planktonic copepod crustacean. The first transcriptome for the key North Atlantic copepod Calanus fin Read more on this news related to 'Crustacean'
- Giant isopod dies after 5 years without food
TSU - A giant isopod, a crustacean related to the wood louse, died after five years without eating in Toba Aquarium in Toba, Mie Prefecture, the aquarium has confirmed. The death was confirmed Friday. A dissection was performed by the aquarium, but no cause of death was found. It will be frozen for preservation, according to the aquarium. The giant isopod that die Read more on this news related to 'Crustacean'
- VIDEO Crustacean is biggest fan of SMU Mustangs
President Bush, Troy Aikman and Mark Cuban all must have connections. They've all been able to get tickets to SMU basketball games, and that’s not easy these days. Mike Castellucci introduces us to the most passionate ticket-holder. Read more on this news related to 'Crustacean'