Beachgoers in Rincon, Puerto Rico, were left confused this week after a large blue marlin (or billfish) swam erratically onto the shore of a local beach. YouTuber Angela Brill managed to capture the strange scene on video. "No one was fishing there," she explains. "There was no hook in this fish, and it just came right up."

Some suggested the fish simply got too close to shore while chasing ballyhoo, a small, silver bait fish commonly found in the area. "But it just kept on [like that] until it died," notes Brill on her YouTube page. "The locals said it must have been sick. We snorkelled with it dead for a few days before it was removed from the water."

Top header image: J Thomas McMurray/Flickr