slideshow Deep Ocean Census of Marine Life Studying Hydrothermal Vent Life Credit: MARUM, Bremen University/ChEss, Census of Marine Life Census researchers manipulate the robotic arm of the remotely operated vehicle (ROV) Quest to study shrimp and other deep sea life forms. They discovered the creatures at a hydrothermal vent 3 kilometers (1.9 miles) below the surface of the Atlantic. Measuring a Skate on the Mid-Atlantic Ridge Credit: Nicola King, Oceanlab, University of Aberdeen/MAR-ECO, Census of Marine Life How does this skate (Bathyraja richardsoni) measure up? Researchers use underwater equipment to estimate its size. The marks on the meter-long scale bars are 10 cm apart. The yellow ribbons show which way the current is flowing on the Mid-Atlantic Ridge. Orange Roughy Credit: NIWA, New Zealand/CenSeam, Census of Marine Life Scientists believe orange roughy (Hoplostethus atlanticus) live longer than 150 years! Here, Census of Marine Life researchers used an underwater camera to photograph this group of orange roughy swimming over New Zealand’s Graveyard seamount complex.