In the rivers of Tasmania, home to the largest freshwater crayfish in the world - Astacopsis gouldi. In the past, this type of crayfishreached more than 80 centimeters in length and weighed more than five kilograms. Now is not such big meet, the average size of40-60 inches in length and weighs 3.4 pounds.

They live in northern Tasmania, in the quiet tree-lined rivers and streams with a very clean, oxygenated, water, whose temperaturedoes not drop below 18 degrees Celsius. Cancers differ in color, which depends on the habitat. Because color can vary from brown to greenish-blue. But there are absolutely blue individuals

Astacopsis gouldi - centenarians. Their age can be up to 40 years! And they have a very long reproductive process.Reproductive age in males occurs at 9 years old, female - 14years. Cancers include male ”harem” of several females.Breeding of offspring occurs once in two years.

Because of over-fishing in the rivers and agricultural human activities that reduce water quality in rivers, crabs lost some oftheir habitat. In the late 20th century, this kind of recognizedendangered and the Australian Government passed a law banning the catching of crayfish without special permission. Violators - a fine of $ 10 000.