Whether Asian tiger mosquitoes, Nile geese or the Hyalomma tick: they are not actually native to Hesse and yet the so-called invasive animal species are spreading rapidly. Now a new pest has been discovered: the giant carnivorous worm. It grows up to 70 cm long and originally comes from Brazil. The worm is said to have come to Europe in the soil of potted plants. We talk about the problem with invasive species.