Which prokaryotes would one expect to be found in the chimney-vent fluids of Lost City?

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Methanogens are anaerobic prokaryotes that produce methane and thrive in extreme environments like hydrothermal vents. They are commonly found in the chimney-vent fluids of Lost City. E.coli is a common gut bacterium found in animals and humans and is unlikely to be present in this environment. Photosynthetic bacteria require sunlight to produce energy and are therefore unlikely to thrive in the dark and deep environment of Lost City. Aerobes are prokaryotes that require oxygen to live, which is unlikely to be present in the hydrothermal vent environment. Halophiles are prokaryotes that thrive in high salt concentrations and are unlikely to be found in fluids from Lost City.

Which Prokaryotes Would One Expect to Be Found in the Chimney-Vent