occur hydrothermal vents black smoke holes in the seafloor spewing heat http://oceanservice.noaa.gov/facts/vents.html holes in the seafloor spewing heat "A hydrothermal vent forms when seawater meets hot magma" http://oceanservice.noaa.gov/facts/ve… hydrothermal vent teeming with life holes in the seafloor spewing heat hydrothermal vent holes in the seafloor spewing heat hydrothermal vent sites hydrothermal vents http://oceanservice.noaa.gov/facts/vents.html hydrothermal vents ultrahot hydrothermal vents hydrothermal vent hydrothermal vents holes in the seafloor spewing heat hydrothermal vent holes in the seafloor spewing heat hydrothermal vent sites https://oceanservice.noaa.gov/facts/vents.html holes in the seafloor spewing heat geothermal vents hydrothermal vents http://oceanservice.noaa.gov/facts/vents.html https://oceanservice.noaa.gov/facts/vents.html holes in the seafloor spewing heat black smokers 40 years ago 40 years ago holes in the seafloor spewing heat black and white smokers hydrothermal vents hydrothermal vents hydrothermal vents black or white smokers holes in the seafloor spewing heat hydrothermal vents hydrothermal vents hydrothermal vents hydrothermal vents NOAA hydrothermal vents hydrothermal vent hydrothermal vent hydrothermal vents NOAA hydrothermal vents https://oceanservice.noaa.gov/facts/vents.html hydrothermal vents Hydro-thermal vents Hydrothermal vents hydrothermal vent "A hydrothermal vent forms when seawater meets hot magma" "A hydrodermaw vent forms when seawater meets hot magma" black smokers "A hydrothermal vent forms when seawater meets hot magma" occur http://oceanservice.noaa.gov/facts/vents.html http://oceanservice.noaa.gov/facts/vents.html holes in the seafloor spewing heat holes in the seafloor spewing heat