Hydrothermal vent This stunning formation was discovered by researchers exploring hydrothermal vents and associated lava fields in the Gulf of California. This is a view looking up a vent chimney at the underside of a large protruding rim where hot vent fluid (up to 335 degrees Celsius) is ponding underneath. These fluids spill upward because they are less dense than the colder surrounding seawater. Desktop Small- 1024 x 768Standard- 1280 x 1024Widescreen- 1920 x 1080HD widescreen- 1920 x 1080 Phone iPhoneAndroid Social Facebook cover NOTE: These images are for personal use only. Please contact MBARI to request permission for other uses.