|Genus:|| Thymops |
Nephropides birsteiniZarenkov & Semenov, 1972
Thymops birsteini, the Patagonian lobsterette, is a species of lobster found around the coasts of South America, particularly the South Atlantic. It belongs to the monotypic genus Thymops.
T. birsteini is found on the continental shelf around South America, particularly in the Argentine Sea. In the Atlantic Ocean, it is found south of 37° south, with Uruguay representing the northern extremity of its distribution; 120–1,500 metres (390–4,920 ft).on the Chilean (Pacific) side, it is found south of 51° south. Its range includes the areas around the Falkland Islands (Islas Malvinas) and areas near South Georgia, extending as far south as 57°, close to the Antarctic Peninsula. It lives at depths of
T. birsteini resembles a typical lobster, with two large claws, four other pairs of pereiopods, and a long pleon (tail). The carapace is granular, especially in the front half, and it bears a rostrum which divides into two points at its tip. 8 to 25 centimetres (3.1 to 9.8 in), with the carapace being 2–10 cm (0.79–3.94 in) long. Smaller individuals are found in shallower waters, and larger individuals are found at greater depths (up to 1,400 m or 4,600 ft). There is also latitudinal variation in colour, with northern individuals being pale yellow, while those from further south are maroon.The total length may range from
Little is known about the biological interactions of T. birsteini. It is occasionally eaten by the Patagonian toothfish Dissostichus eleginoides.It seems to prefer muddy bottoms, and has been observed entering and exiting burrows.
As in other pleocyemates, T. birsteini broods its eggs on the female's pleopods. One female may carry up to 380 eggs, each 1.5–1.9 millimetres (0.059–0.075 in) in diameter. The eggs grow as they develop to a size of 2.9–3.3 mm (0.11–0.13 in). Newly hatched larvae have a carapace length of 1.7–2.2 mm (0.067–0.087 in), and are present in smaller numbers than the eggs, with a maximum of 43 observed on a single female. This extended larval release has previously been found in other sub-Antarctic decapods, and is an adaptation to the low temperature, the long time taken for brooding, and the low overall fecundity.
The meat of T. birsteini is reported to be excellent, 150 grams (5.3 oz), of which 30% (45 g or 1.6 oz) is the meaty tail. Daily yields of 19 kilograms (42 lb) are typical.and it is thought that the species could be commercially exploited if sufficient concentrations could be discovered. The average weight of a caught individual is about
The Patagonian toothfish is a species of notothen found in cold waters between depths of 45 and 3,850 m in the southern Atlantic, Pacific, and Indian Oceans and Southern Ocean on seamounts and continental shelves around most Subantarctic islands.
Metanephrops challengeri is a species of slim, pink lobster that lives around the coast of New Zealand. It is typically 13–18 cm (5–7 in) long and weighs around 100 g (3.5 oz). The carapace and abdomen are smooth, and adults are white with pink and brown markings and a conspicuous pair of long, slim claws. M. challengeri lives in burrows at depths of 140–640 m (460–2,100 ft) in a variety of sediments. Although individuals can live for up to 15 years, the species shows low fecundity, where small numbers of larvae hatch at an advanced stage.
The grey-headed albatross also known as the grey-headed mollymawk, is a large seabird from the albatross family. It has a circumpolar distribution, nesting on isolated islands in the Southern Ocean and feeding at high latitudes, further south than any of the other mollymawks. Its name derives from its ashy-grey head, throat and upper neck.
Ibacus peronii, the Balmain bug or butterfly fan lobster, is a species of slipper lobster. It lives in shallow waters around Australia and is the subject of small-scale fishery. It is a flattened, reddish brown animal, up to 23 cm (9 in) long and 14 cm (6 in) wide, with flattened antennae and no claws.
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Dissostichus, the toothfish, is a genus of notothen found in the Southern Hemisphere. Toothfishes are marketed in the United States as Chilean sea bass or less frequently as white cod. "Chilean sea bass" is a marketing name, coined in 1977 by Lee Lantz, a fish wholesaler who wanted a more attractive name for selling the Patagonian toothfish to Americans. In 1994, the U.S. Food and Drug Administration (FDA) accepted "Chilean sea bass" as an "alternative market name" for Patagonian toothfish. The toothfish was remarkably successful in the United States, Europe and Asia, and earned the nickname “white gold” within the market. Toothfishes are vital to the ecological structure of Southern Ocean ecosystems. For this reason, on 4 September a national day is dedicated to the toothfish in South Georgia.
Polycheles typhlops is a species of blind, deep water decapod crustacean with a cosmopolitan distribution. It is "one of the dominant and most characteristic crustaceans in deep-sea communities of the Mediterranean Sea".
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Nephropsis atlantica, sometimes called the scarlet lobsterette or scarlet clawed lobster, is a species of lobster from the Atlantic Ocean.
Stauroteuthis gilchristi is a species of small pelagic octopus found at great depths in the south Atlantic Ocean. It is believed to be one of a very small number of octopuses to exhibit bioluminescence, like its sister taxon Stauroteuthis syrtensis.
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Geryon trispinosus is a species of crab that lives in deep water in the north-eastern Atlantic Ocean.
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