Image generated by AI thanks to Google Gemini.

Hard to explain this one, except that it started with me asking Gemini about DNA & RNA. Will spare you the minute details, but I found it very insightful. Then at the end, it asked me if I wanted to experiment with creating some unique creatures on an alien RNA world. I was like "Ok sure, why not?!" 🤪

This one turned to be my favorite from a very limited test run. I call it Arx Errans, which I believe is Latin for Wandering Fortress. Here's a short description, which Gemini also helped me out with:

Since their genetic material is fragile, these creatures don't have soft skin. They build hermetically sealed shells to protect their internal RNA "soup."
- Appearance: They look like walking geometric crystals or giant diatoms (glass shells).
- Biology: The creature lives strictly inside a silica or calcium-carbonate shell. It interacts with the world only through retractable, liquid-filled siphons.
- Lifecycle: They don't "grow" like mammals. They build a new, larger shell chamber, migrate into it, and seal off the old one, like a nautilus made of glass.