http://www.flickr.com/photos/ecologywa/8142290039/in/set-72157630409598334 I see what you mean.
Thank fully the beaches such as Lunan Bay near where I sometimes do my sea fishing are reasonably clean and free of such plastic pollution.
http://www.youtube.com/watch?v=WBm4D6RcaAsI've been hearing about some bad news about the Pacific Ocean recently, such as dying seals due to radiation in Alaska (Fukishima Catastrophe Fallout?) and I have even heard that Pacific Mackerel have become almost impossible to find. I don't know how true this is though but considering the Midway plastic pollution disaster it may have some credibility.
http://www.youtube.com/watch?v=1SO89Bj2Fvc