The fascinating creature above is the larvae of the Caddisfly, which given some gold and jewels was able to create some works of art.
In nature, the Caddisfly larvae build protective cases using materials found in their environment. French artist and sculptor Hubert Duprat found out about these bugs, and had a genius idea for an experiment. He placed these larvae in an environment which only supplied them with gold leaf and precious stones to see what they can create.
The results were nothing short of incredible, and Duprat continued to experiment with these creatures from 1980-1996. Check out some photos of their creations, as well as a photo of a Caddisfly "caccoon" in a natural environment, a full grown Caddisfly (we had no idea what this thing was) and a video at the bottom in which we get to see one of these guys in action and Duprat discusses his works and creative process:
Here is what a Caddisfly larvae would create in nature:
This is what an adult Caddifly looks like:
Here is the video about Dupart's work (the Caddisfly stuff begins at 2:30)