This 60-m extension cable will soon host a high-definition video camera to be deployed at the Mushroom hydrothermal vent (far left). White microbial mats along narrow fractures in the lobate lava flows mark areas where low-temperature diffuse hydrothermal fluids issue from the seafloor. The 7-function manipulator arms of the Canadian ROV ROPOS gently place the wet-mate connector holding plate on the seafloor. VISIONS '13 Leg 4
Photo credit: NSF-OOI/UW/CSSF.