Sea Serpents! Check the video of the Oarfish in the link below! Isn't the earth and it's inhabitants amazing! The sea is like this incredible alien world, and we still know so very little of it's secrets!
http://www.nbcnews.com/science/horned-sea-monster-it-could-be-shark-or-oarfish-6C10971972
http://www.nbcnews.com/science/horned-sea-monster-it-could-be-shark-or-oarfish-6C10971972