Deep lakes or the sea, have high pressure water in turbulent flow – which does Molecular Nuclear Fusion
1 H2O+TU+P ->He+O+E2+X-ray+L
The production of helium and X-rays is on record. http://www.lenntech.com/periodic/water/helium/helium-and-water.htm.
They think there is a biological source of the he. There is no such biochemical source – helium is lost to space within 24hrs, having reacted wih nothing. X-rays need high energy events – like nuclear fusion.
So the deep seas do nuclear fusion. Giving off light flash illumination btween visible and X-ray radiaition.
This explains why there is so much life in the deep. Bacteria are using the light flashes to do nuclear fusion. So life is not supported solely by biomass filtering down.
To study this life, we need to send down robot cameras – and see how life does nuclear fusion on Earth.
I like steam plasma tubes, they turn water int olight – included UV light – we might wish to include a phospher to turn the IR into UV.
We could mount these tubes in lake bottoms, and increases the life on the deep. Which get CO2 by osmosis from the air, and ties up the CO2 as biomass. It will also increase fish life in lakes.