Crayfish, freshwater crustaceans belonging to the superfamilies Astacoidea and Parastacoidea
Crayfish can move backward much faster than they can move forward.
This species was last seen in 1948 and is believed to have gone extinct in the early 1950s, likely as a result of habitat alteration and competition with and predation by introduced crayfish Procambarus clarkii, mosquitofish (Gambusia affinis), black mollies (Poecilia sphenops), and bullfrogs (Rana catesbiana).
In 1839, the French explorer-naturalist Justin Goudot returned from an expedition to Madagascar bearing specimens of a crayfish he had collected there.
Astacus leptodactylus, the "Danube crayfish", "Galician crayfish", "Turkish crayfish" or "narrow-clawed crayfish", is a species of crayfish imported and introduced to Central Europe in 19th century from the Caspian Sea region.
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Astacus pachypus, the "Caspian crayfish", is a species of crayfish found in the Caspian Sea, the Don river, and parts of the Black Sea and Sea of Azov, where it lives in salinities of up to 14‰.
Some reaches of this river which passes through Burn Bridge are protected with associated SSSIs and SINCs, and freshwater fish and crayfish are protected under various Acts.
The intra-caldera islands, on the other hand, support some wildlife, most notably the Silvery Grebe, which lives around the reeds and feeds on small fish, frogs, crayfish, small water snakes, seeds of water plants, and insects.
Fish is consumed in various ways—roasted, grilled, raw and in soups or stews—and there is a wide spectrum of edible and enjoyable fish species: Tuna (ahi), dolphin (mahi mahi), Parrot fish (pakati), Barracuda (ono), coconut crabs and Crayfish.
The Lady Amherst's Pheasant (Chrysolophus amherstiae), Green Peafowl (Pavo muticus), Bulwer's Pheasant and the Crestless Fireback (Lophura erythrophthalma) are notable for their aptitude to forage for crustaceans such as crayfish and other aquatic small animals in shallow streams and amongst rushes in much the same manner as some members of the rail family (Rallidae).
The Huerva is relatively little polluted in its upper course, hence endangered species like the Austropotamobius pallipes crayfish and fishes like Barbus haasi, Rutilus arcasii and Chondrostoma toxostoma are to be found in its waters.
The main threats it faces are the degradation of suitable terrestrial habitat, pollution and loss of suitable breeding pools, and the introduction of the invasive crayfish Procambarus clarkii and non-native fishes which prey on the tadpoles.
In Cuba and other Spanish-speaking Caribbean islands, the name langostino is also used to refer to crayfish.
It is also a commercially significant region, supporting the economy of New Orleans with significant shipping traffic, providing 16 to 18% of the oil supply in the U.S., and providing 16% of the fisheries harvest in the U.S., including shrimp, crabs, and crayfish.
On Swamp People they would regularly be featured hunting for their dinner which included Alligator gar, Blue catfish, Crayfish, Cottontail rabbit, Squirrel, Bullfrog, Alligator Snapping Turtle, and once by accident an American Alligator.
Upland woods and slightly-elevated lowland chimney crayfish (Cambarus diogenes) burrows are used as winter hibernation sites.
The Allegheny crayfish, Orconectes obscurus, is a stream-dwelling species of crayfish in the family Cambaridae found in Southeastern Ontario and the Northeastern United States.
Orconectes shoupi is a federal and state endangered crayfish that resides on Mill Creek in Davidson and Williamson counties in Tennessee.
The PM-63 RAK (short for Ręczny Automat Komandosów — "commandos' hand-held automatic"; the abbreviation itself means crayfish in Polish) is a Polish 9mm submachine gun, designed by Piotr Wilniewczyc in cooperation with Tadeusz Bednarski, Grzegorz Czubak and Marian Wakalski.
The CrustaStun is a device designed to administer a lethal electric shock to shellfish (such as lobsters, crabs, and crayfish) before cooking.
There was plenty of campaigning from both sides, the best remembered poster being one designed by artist Albert Engström, with the famous quote Kräftor kräva dessa drycker ("crayfish require these drinks").
Adult crappies feed mainly on other fish and some large invertebrates such as crayfish and hellgrammites.
Many crustaceans like crabs (Scylla spp., Portunus spp.), spiny lobsters (Panulirus spp.), crayfish (Astacus spp., Cherax spp.) and freshwater shrimp (Macrobrachium spp.) are reported to be infected with variable severities depending on the life stage of the host and presence of external stressors (temperature, salinity, bacterial diseases, pollutants).
Fishing also contributes to the community; the many nearby lakes and ponds are rich in Pike (Esocidae), Crayfish (Astacus astacus) and Eel (Anguilla anguilla).