3D illustration of a sci-fi Japanese capital

[Gamerprinter]

Vapor Kine are a kind large, floating, invertibrate creature of unusual biology, about the size of an imperial mammoth. It is native to Mini Neptune type, small gas giants with rocky cores,
and extremely high pressure of mostly-hydrogen atmosphere, but it's metabolism absorbs lithium-6 from the atmosphere and metabolizes it into tritium, which it excretes and eventually decays into helium-3. Although the creature is inoffensive and somewhat less intelligent than an Earth cow, the helium it produces has valuable uses, causing them to be herded in vast ranches in certain gas giant's dense atmospheres, tended by special robotic herders designed to withstand the gravity, pressure and temperatures they need to survive.

GP