Jetfish

The Jetfish is a species of planetary fish.

Biology
As the name suggests, the Jetfish is essentially a space-faring fish, mainly a Koi or a Goldfish. It lacks any fins along the sides, bottom, or top of the body. The only main fin structure on said fish is the tail fin, and even then it doesn't apparently use it. Its eyes are constantly squinting, or closed completely.

Although commonly orange in color, rarer specimens of Jetfish covered in pristine gold had also been known to exist.

Technology
It's currently unclear if the Jetfish created the technology themselves, or are given to them by an outside force, but they get their name due to a jet-propulsion device attached to their bodies, which allows them to travel at a decent speed above the ground.