Ever see a sea lion open its mouth? They have a mouth full of long, sharp teeth. Hence the name. These are not your playful seals. Who would swim where there are sea lions?
http://beta.latimes.com/local/lanow/la-me-ln-third-sea-lion-attack-san-francisco-20171215-story.html
http://beta.latimes.com/local/lanow/la-me-ln-third-sea-lion-attack-san-francisco-20171215-story.html