One of the big tourist attractions in San Francisco is Pier 39 – and that is mainly because of the sea lions.
“When a sea lion was spotted at PIER 39 with monofilament fishing line wrapped around his neck, The Marine Mammal Center launched a daring rescue mission to save him.”
You can read more about the rescue of Pickles from the fishing line at
http://www.marinemammalcenter.org/about-us/News-Room/2014-news-archives/pickles.html
You can read more about sea lions at
http://www.marinemammalcenter.org/education/marine-mammal-information/pinnipeds/california-sea-lion/#.U6RlWhb-rwI