The world's largest freshwater lobster? Tasmanian crayfish talk about endangered creatures, and the world is the most eye-catching. Tasmanian crayfish, as a giant crayfish, can weigh as much as ten pounds.
Tasmanian crayfish, also known as lobster tiger, has a large head and chest, an extremely hard shell and bright colors, generally 40 cm long and about 5 kg. It belongs to the largest category of lobsters, with a thick barrel shape as a whole, a flat back and abdomen, and a hard and spiny shell.
Tasmanian crayfish is also by far the largest freshwater invertebrate known to human beings. Tasmanian crayfish have extremely powerful pliers. There are various colors, such as light yellow, dark brown, light black, bright blue, dark blue, etc., and the colors vary from place to place.
This kind of crayfish is usually hidden in the dark, and it likes to live in rivers with slow water flow and streams with rich nutrients, and it is also found in deep pools and under overhangs, requiring high oxygen content water quality.
Tasmanian crayfish originally lived in Australia and Tasmania, as well as in the upper class of bass strait. Nowadays, because of people's over-exploitation, their habitats are extremely scattered, hiding in various scattered areas to survive.
Food sources of Tasmanian crayfish
This kind of crayfish is an omnivore. It likes to eat rotten wood and meat, and leaves and insects will eat it if they fall into the water. Juvenile Tasmanian crayfish will feed in shallow waters, and when they grow up, they will live in deep pools with other crayfish. Although they are crowded, they still maintain the habit of living in groups.
Reproduction process
The larva of Tasmanian crayfish is a small creature only 6 mm long, and its maturity rate is extremely slow, and it lives for 40 years. Reproductive maturity occurs in males and females about nine years 14 years, and females reproduce every two years. Mating takes place in autumn and spring, and the legs connected to females are in the process of development, and after hatching in summer, the rest are attached to swimming legs just one month after hatching. Such a long reproductive process means that females spend their lives with their legs, and adult lobsters have no natural enemies at all.
Fishing area
With the improvement of relevant protection laws, the number of Tasmanian crayfish in Australia has remained stable at present, but it has not increased significantly, and there are hidden concerns.
The new research shows that the crayfish stocks in Tasmania remain stable, but officials of Tasmania Tourism, Fisheries and Fisheries Association say that the growth rate of crayfish has been slow since the introduction of commercial fishing quota in 1998.
Caleb Gardener, an official of the association, said that the number of crayfish remained stable last year, but MrGardener said that there were still some differences between the number of shallow-water lobsters and that of deep-water lobsters. He said that the quality of lobsters in shallow waters is high, which can be seen from the bright red color of lobsters, and leisure fishermen mostly concentrate on fishing in shallow waters. But we haven't noticed the fishing in deep water.
The difference between freshwater lobster and Australian freshwater lobster Cherax quadricarinatus, whose scientific name is four-ridged light-shelled southern crayfish, also known as red crayfish, is native to Australia and looks like a lobster in the sea. It is one of the most precious freshwater economic shrimp species in the world. The color of this shrimp is brown and green, and the top of the outside of the mature male shrimp's claw has a bright red band, which is beautiful and beautiful, so it is also known as red crayfish.
Australian freshwater lobster, also known as red crayfish, belongs to the decapod crayfish family. It is a large freshwater crayfish, native to Australia. In recent years, this shrimp has been introduced to Guangdong Province for trial culture, and has successively achieved the success of artificial propagation of seedlings and adult shrimp culture. At present, it is being promoted in and out of Guangdong Province. Australian freshwater lobster is called freshwater lobster because of its large size, somewhat similar appearance to sea lobster and only living in fresh water. Its individual generally weighs100 ~ 200g, and the largest individual in Australia can weigh 500g. According to research, Australian freshwater lobster is one of the rare economic shrimp species in the world.
Freshwater lobster (crayfish), commonly known as crayfish, is also known as mole cricket and crayfish in all parts of China. In Singapore, it is commonly known as Shrimp Woman, which is a kind of freshwater shrimp, similar to lobster and small in size, and is widely distributed all over the world at present.
Freshwater lobsters are widely distributed all over the world. It is mainly divided into three families: Parastacidaceae, Orthocrayfish (or Crab and Shrimp) (Astacidae) and Crambatidae (or Craybodidae) (Cambaridae), with dozens of genera and more than 400 species.
The Procambarus is mainly distributed in Madagascar, Australia, New Zealand, Chile, new guinea and other places belonging to Gondwana, with a large body, and the heaviest individual found in Tasmania reaches 6 kg.