expedition leader cornelia yon spurs is a jellyfish expert the data that's been collected still has to be evaluated but the initial impression his worry. coward the entire german politics ecosystem taking samples from a variety of which show that the already coming jellyfish can be found everywhere. and differing sizes and density matter if you notice it isn't clear that we have a big problem with them the op says especially here in kiel in the southwestern baltic. the warty comb jellyfish is native to the east coast of the us ships presumably carry them as stowaways to the black sea in the 1980s from there they've spread to the caspian sea the mediterranean and or northern europe. the creatures also called sea wall not due to their shape may look in conspicuous but they pose a huge challenge oh yeah spurs wants to know if the ecosystem here is holding up limits nish time is not the problem with non-native species is that they don't belong. there only labeled invasive if they start to change the ecosystem. because of stanford and the problem with the walnuts is that they're extremely e