animals we have up here in the baltic they've come from boston woods home that area . boston that's been proved genetically and means that these were 2 completely distinct invasions. so what would happen if the warty come jellies from the black sea were introduced into the baltic. killa come here they are found in large numbers in the southwest and baltic and in the kattegat between denmark and sweden but they haven't conquered the majority of the baltic and. if we can show that the southern spaces has a different genetic repertoire and can cope with the lowest salt content then at the sudden once transferred north that could be a threat on the other hand we don't know what would happen if the southern and northern jellies were brought together we could get super potent hybrids or we could get hybrids that can't reproduce it's a very exciting question that's really significant for the future of the baltic.