Clugon's hydrogen-helium atmosphere is given a fairly dramatic emerald tint by chlorine and ionized gases. It has nearly 100 moons.
The system is no older than 10 million years and the planet is far too small to be a gas giant (although, to their credit, the designers did not claim explicitly that this planet was a gas giant). Clugon is likely a large terrestrial planet; a Tungel with thicker cloud cover. In another system it would attract enough matter and gas to become a Neptune or even a Saturn, but this one will go supernova first.