Riftia tubeworms colonize diffuse vent habitats between broken pieces of lava.
Small mussels, less than two inches, were growing in cracks adjacent to
vent openings (lower right).
Image ID: expl6553, Voyage To Inner Space - Exploring the Seas With NOAA Collect Photo Date: 2011 July 22 Credit: NOAA Okeanos Explorer Program, Galapagos Rift Expedition 2011