These are some of the phenomenal winners of the 2013 Rosenstiel School of Marine and Atmospheric Science Contest. Click on the images for image information and visit the contest site for more fantastic underwater photos.
Free divers (divers who rely only on their own breath) Christina & Eusebio Saenz de Santamaria documented their own adventures underwater in this incredible series of photographs. You can see more of their adventures here.
Photographer Jason Bradley has photographed some pretty freaky things while working with the Monterey Bay Aquarium Institute and the Moss Landing Marine laboratories on a project to document previously unseen deep sea creatures.