so they can have an impact on the functioning of the marine ecosystem some cases so we have large eliphaz wish to reach dance it is life up to 300 or 400 pounds a square tube. meters along the coastline so this would affect particularly human activities for life. swimming along the course or fishery and even our cultural plants may be affected because in some cases the venomous china fish can kill hundreds or thousands of fish in a few days these booms are using local fishing industries and it's estimated that in the north is rarity they cost italian fishing fleet $8500000.00 euros a year steffen and sent me north to the aquarium of genoa to discover how the creek to its unique reproductive process is really compounding the problem babies found when live near the village maybe a fish. curator soviet lover on know is breeding thousands of jellyfish. this little she doesn't know about these potent pulsing creatures. why are the jellyfish so efficient reproducing they are doing that relieve a huge a quantity of sperm and egg they fertilize in this that we have plenty of love all this can go