I know this is a vague response, but just yesterday I saw a photo that was posted either here on the message board or on one of the local Facebook pages, La Manzanilla Life or Costalegra Amigos. It was of a number of red snappers in a crate, and on top was a baby hammerhead. Maybe the fishermen discarded that shark, and some dog decided to chew on it--right outside your door, Daniel.