Marbled Crayfish

The Marbled Crayfish (Procambarus virginalis), also known as the marmorkrebs, is a medium-sized freshwater crayfish. It is the only known decapod crustacean that reproduces entirely by obligatory parthenogenesis. This means the entire population consists of all-female triploid clones that reproduce asexually. They create genetically identical offspring without requiring sperm or egg fertilization. It was first discovered in the German pet trade in the earl 1990s, it is a highly adaptable species which has rapidly evolved into a highly destructive invasive species worldwide. It was first reported in the wild in Germany but has since been reported in the wild in several other European countries, Madagascar, Canada, USA as well as in Israel, Japan, Taiwan, Macao and South Korea.

Great article from Harper's Magazine on Marbled crayfish in Madagascar.

Stowaways, by Rowan Moore GeretyMadagascar reckons with an invasive crayfish

Scientists work to stop self-cloning crayfish in Burlington, Ont., pond after 1st detection in Canada | CBC NewsAn invasive species of crayfish that reproduces by cloning itself was discovered this fall in a Burlington, Ont., pond. It was the first time the marbled crayfish has been identified in the wild in North America, and since then, a group of experts has been working to stop it from spreading.

Article by Canadian Geographic: "Attack of the clones: the mysterious mutant threatening to invade Canada’s waterways".

canadiangeographic.ca/articles/attack-of-the-clones-the-mysterious-mutant-threatening-to-invade-canadas-waterways/