When the Schmidt Ocean Institute’s research vessel Falkor headed to the Gulf of California recently, it carried a typically wide-ranging crew. An international, multidisciplinary team of scientists planned to study the deep-sea environment of a depression known as Pescadero Basin, with depths of more than 12,000 feet. The basin’s unique hydrothermal vents—accessed by the team using the underwater ROV SuBastian—form elaborate calcite spires and spew clear fluid, unlike the “black smoker” vents found in the Atlantic and elsewhere. Life thrives in this extreme environment. The researchers documented iridescent blue worms,…