The family Astacidae comprises the freshwater crayfish native to Europe and western North America. It is made up of three genera. Genus Pacifastacus, is found on the Pacific coast of the United States and British Columbia and includes the signal crayfish and the Shasta crayfish. Genus Astacus and Austropotamobius are both found throughout Europe and parts of western Asia. See genus (mathematics) for the use of the term in mathematics. ... For a Greek place of this name, see Astakos Species Astacus astacus Astacus leptodactylus Astacus pachypus Astacus is a genus of crayfish found in Europe and western Asia, comprising three species: Astacus astacus (Linnaeus, 1758), the noble crayfish, European crayfish, or broad-fingered crayfish Astacus leptodactylus (Eschscholtz, 1823), the Danube... Binomial name Pacifastacus leniusculus (Dana, 1852) The signal crayfish, Pacifastacus leniusculus, is an American crayfish indigenous to the western US. Due to the crayfish plague that ravaged European crayfish stocks and has almost exterminated the noble crayfish Astacus astacus, Swedish biologists searched for a crayfish that could replace the native... Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... For the village on the Isle of Wight, see Freshwater, Isle of Wight. ... The word crayfish can mean:- Sea crayfish, also called spiny lobster or rock lobster. ... A satellite composite image of Europe Europe is geologically and geographically a peninsula, forming the westernmost part of Eurasia. ... World map showing location of North America A satellite composite image of North America North America is a continent in the northern hemisphere, bounded on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the south by the Caribbean Sea, and on the west... See genus (mathematics) for the use of the term in mathematics. ... Binomial name Pacifastacus leniusculus (Dana, 1852) The signal crayfish, Pacifastacus leniusculus, is an American crayfish indigenous to the western US. Due to the crayfish plague that ravaged European crayfish stocks and has almost exterminated the noble crayfish Astacus astacus, Swedish biologists searched for a crayfish that could replace the native... The Pacific Ocean (from the Latin name Mare Pacificum, peaceful sea, bestowed upon it by the Portuguese explorer Ferdinand Magellan) is the worlds largest body of water. ... Binomial name Pacifastacus leniusculus (Dana, 1852) The signal crayfish, Pacifastacus leniusculus, is an American crayfish indigenous to the western US. Due to the crayfish plague that ravaged European crayfish stocks and has almost exterminated the noble crayfish Astacus astacus, Swedish biologists searched for a crayfish that could replace the native... Binomial name Pacifastacus fortis (Faxon, 1914) The Shasta crayfish (Pacifastacus fortis), also known as the placid crayfish, is an endangered crayfish species endemic to California. ... For a Greek place of this name, see Astakos Species Astacus astacus Astacus leptodactylus Astacus pachypus Astacus is a genus of crayfish found in Europe and western Asia, comprising three species: Astacus astacus (Linnaeus, 1758), the noble crayfish, European crayfish, or broad-fingered crayfish Astacus leptodactylus (Eschscholtz, 1823), the Danube... World map showing location of Asia Asia is the central and eastern part of the continent of Eurasia, defined by subtracting the European peninsula from Eurasia. ...