This is RS 8474-1353-7-1479916-257 B3, a scorched oceania with a supercritical ocean. The surface pressure is over 1,000 atmospheres, and the surface temperature is high enough that the low-level clouds are incandescent. That's not a sea of liquid water down there. It's a sea of supercritical water, which, if you don't know, is a weird sort of hybrid between liquid and gas, which can only exist above a certain temperature and pressure. Supercritical water is a fantastic solvent, so I wonder what weird minerals might be dissolved in that ocean...
