Figure 6: Shinkai 6500 submersible bottom photograph of biological communities at the summit of a serpentine mud volcano in the Mariana forearc. Slab-derived fluids issuing from the seamount support communities of mussels, gastropods, worm tubes and galatheid crabs. The base of the manipulator arm is ~15 cm in diameter. Photo provided by the Japan Marine Science and Technology Center (JAMSTEC), courtesy of Dr. Kantaro Fujioka.