Self-Cloning Crayfish Are Spreading Across the World

Self-cloning crayfish called marbled crayfish have invaded the planet.They have been found in in a number of countries including Hungary, Japan, Sweden and Ukraine. In the European Union, the species is illegal to own, distribute, sell or release the marbled crayfish into the wild. Marbled crayfish didn't even exist until at least 1995 but are capable of unisexual reproduction.