Life at sea -- The message from the mud : making meaning out of microbes in Monterey Bay -- Dissolving the tree of life : alien kinship at hydrothermal vents -- Blue-green capitalism : marine biotechnology in Hawai'i -- Alien species, native politics : mixing up nature and culture in ocean O'ahu -- Abducting the Atlantic : how the ocean got its genome -- Submarine cyborgs : transductive ethnography at the seafloor, Juan de Fuca Ridge -- Extraterrestrial seas : astrobiology and the nature of alien life