So I looked this up and there’s three things I think should be mentioned:
Yes, this is real.
They found this ecosystem in underground hydrothermal caves where the water was 75 degrees Fahrenheit (25 degrees Celsius) and when it says “volcanic fluids” it means that, or where the hot water in the caves comes up through cracks to mix with the colder water above, allowing minerals and nutrients from the volcanic caves to escape and dissolved oxygen from the open ocean to enter.
The robot that tested the hypothesis of life under the seafloor was called SuBastian.
