autonomous sub exploring deep sea on an exoplanet, alien corals glowing

autonomous exploring deep sea exoplanet alien corals glowing diverless oceanography astrobiology submersible starlight exobiology lifeforms underwater extraterrestrial biosphere abyssal aquanaut marine space planetary radiance bioluminescent subaquatic extrasolar mysteries cosmic survey subsea otherworldly depths fluorescent xenobiology futurism celestial seafloor research hydrothermal spacefaring colonizing iocean alienmarine subplanet illumination exomarine deepspace biolumination