Berlion

Berlion is a water giant in the Centauri system primarily composed of Hydrogen.

Liquid water
Berlion is a unique gas giant in the Centauri system, as it hosts a liquid water ocean several hundreds of km deep.

Planetary habitability
Several floating and submarine probes have been sent into the planetary wide ocean by the Delions, every probe was destroyed within 30 minutes of landing in the ocean, always by a colossal shadow that rises from the depths & destroys the probe.