A large bubble of methane gas emanating upward from the crater of a mud
volcano.
Image ID: sanc0471, NOAA's Sanctuaries Collection Location: Flower Garden Banks National Marine Sanctuary Photo Date: 2007 March Photographer: Institute for Exploration. Credit: Rhode Island Institute for Archaeological Oceanography; Secrets of the Gulf Expedition. NOAA/NOS/NMS/FGBNMS.
