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It is known by different names around the world. In the British Isles, it is generally referred to as the shore crab, or green shore crab. In North America and South Africa, it bears the name European green crab. C. maenas is a widespread invasive species, listed among the 100 of the World's Worst Invasive Alien Species. [2]
Leu-enkephalin and Met-enkephalin are present in the thoracic ganglia of the shore crab, Carcinus maenas. [54] Both morphine and naloxone affect the estuarine crab (Neohelice granulata) in a similar way to their effects on vertebrates: injections of morphine produce a dose-dependent reduction of their defensive response to an electric shock. [55]
Pachygrapsus crassipes, the striped shore crab or lined shore crab, is a small crab found on both rocky and hard-mud soft seashores of the northeastern and northwestern Pacific Ocean. In North America, this species occurs from central Oregon, south through California to near Ensenada, Baja California , Mexico .
Hemigrapsus takanoi, the brush-clawed shore crab or Asian shore crab, is a small crab of the family Varunidae (formerly classified as Grapsidae) that lives on rocky shores surrounding the Pacific Ocean, and which is invasive along the European coastlines. This crab is omnivorous and eats small fish, invertebrates and algae.
The Grapsidae are a family of crabs known variously as marsh crabs, shore crabs, or talon crabs. [1] The family has not been confirmed to form a monophyletic group and some taxa may belong in other families. [2] They are found along the shore among rocks, in estuaries, marshes, and in some cases pelagic among drifting seaweeds and flotsam.
Leptograpsodes octodentatus, known as the burrowing shore crab, [4] is a species of crab in the superfamily Grapsoidea, [5] It is the only species in the genus Leptograpsodes, [2] and the family Leptograpsodidae.
Carcinus maenas is a common littoral crab, and an important invasive species, listed among the 100 "world's worst alien invasive species".Although native to the Baltic Sea, North Sea and north-east Atlantic Ocean, it has since become established on both east and west coasts of North America, in Argentina, South Africa and Australia.
In Carcinus maenas, the common shore crab, acetic acid induces a number of behavioral changes, including movement of the mouthparts, rubbing with the claws, and increased attempts to escape from an enclosure. [48] Wasp stinger, with droplet of venom