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Triops longicaudatus (commonly called American tadpole shrimp or longtail tadpole shrimp) is a freshwater crustacean of the order Notostraca, resembling a miniature horseshoe crab. It is characterized by an elongated, segmented body, a flattened shield-like brownish carapace covering two thirds of the thorax, and two long filaments on the abdomen.
Other species may have a slightly curved rostrum, but then the teeth on its dorsal surface continue into the distal third, which is untoothed in P. serratus. [10] P. serratus is pinkish brown, with reddish patterns, and is typically 100 millimetres (3.9 in) long, making it the largest of the native shrimp and prawns around the British Isles. [11]
The giant red shrimp is a deep-water benthopelagic species and has a reported depth distribution of 120–1300 m, generally on muddy bottoms, [2] in the Mediterranean it shows a preference for quite deep waters, mainly 500-800m, but it is more likely than related species to be found in shallower waters. [4]
The fairy shrimp of the order Anostraca are usually 6–25 mm (0.24–0.98 in) long (exceptionally up to 170 mm or 6.7 in). [11] Most species have 20 body segments, bearing 11 pairs of leaf-like phyllopodia (swimming legs), and the body lacks a carapace. [12]
The natural coloration of the shrimp is green-brown, though a wide variety of color morphs exist, including red, yellow, orange, green, blue, violet and black shrimp. Full-grown shrimp reach about 4 centimetres (1.6 in) long. N. davidi shrimp are omnivores that may live 1–2 years.
Caridina dennerli is a small species of freshwater shrimp from Sulawesi (Indonesia) that grows up to 2.5 centimetres (1.0 in) in length. It takes its name from the German company Dennerle, which supported the expedition that led to the scientific description of the species. [2]
The size of a mysid brood generally correlates with body length and environmental factors such as density and food availability. [9] The age at which mysids reach sexual maturity depends on water temperature and food availability. [9] [10] [11] For the species Mysidopsis bahia, this is normally at 12 to 20 days. [11]
Palaemon varians, known as the Atlantic ditch shrimp [2] and variable shrimp, [3] is a caridean shrimp [1] [3] found from the Baltic Sea and the British Isles to the western Mediterranean Sea. [4] It reaches up to 5 cm (2.0 in) in length and is never found in fully marine conditions, instead living in brackish water.