I joined the Octan Security Services straight out of the Spaceforce. After a four year tour on Earth's moon trying to keep the locals under control while resentment of Earth-gov control became endemic. The final uprising, caused by a Spaceforce ship crashing into a school bus was nasty and I saw things. Things no one should see, things I won't talk about.
So here I am on Titan, sixth moon of Saturn, where the rocks are made of water, hard as granite and the rivers and lakes are liquid hydrocarbons, methane and ethane, all the 'thanes' as Gunther puts it. Gunther is my boss here, he basically sits in the control room and tells us where the Meth-Roaches are swarming, he's okay, pretty messed up from stuff he saw on the moon too though.
Meth-Roaches? Yeah, well when humans got here to Titan there was no life, not even bacteria. Great for the oil companies of course, nothing for the hippies to protest about. The Mars settlers wanted to burn hydrocarbons to create an atmosphere, the oil companies had a nice new supply of them. All great, but 'life finds a way' as that old movie put it. The bacteria mutated first, but we weren't watching for that then the roaches first learned to cope with the intense cold, then somehow their mitochondrial DNA started to run on methane instead of oxygen. The scientists tell me it was probably from eating the bacteria. Then they took the moon for themselves, titanic Roaches on Titan. Almost funny.
Most of them eat the bacteria or each other, the problem is the pipelines are slightly warmer, so the bacteria grow more around them, the Methane Roaches (Meth-Roaches) chomp on it, lots of leaks follow.
So I'm a bug squisher! We can shoot them if there's good cause, but firing lasers has a small chance of igniting the landscape (if we hit a pocket of frozen oxygen) and the gattling-railgun is hard to get ammunition for, so we generally stamp on them, they crunch quite satisfyingly. The pays pretty good, too and there are no Lunar-citizens throwing IED's at me. In another five years when my contract is done I should be able to buy a house in an area of Earth where the environment is still reasonable or maybe Mars, lots of room on Mars. Life is good.