When the Global Warming melt the Polarcaps, the waterlevel rises and many atomreactors blown up, this monster was born. In the poluted water a shark mutated over years and get these tentacles to hunt his food more efficiently. The strange 'Blobs'/Bags or what ever you want to call them are radioactive tumors, that explodes, when he get in danger.
I know my english is poor, but I hope you understand something.xD
School English mark: 'D' xD