Cadmus

Cadmus is the fifth moon of Jupiter.

History and Etymology
Cadmus was found and named in 1610 by Galileo Galilei, who was looking at Jupiter. This also applies to Ganymede, Callisto, Io and Europa.

The name "Cadmus" comes from the founder and first king of Thebes in Greek mythology. The demonym of Cadmus is Cadmean, with Cadmian being a variant.

Geography
Cadmus's geography is characterized by a red, cratered surface with numerous holes. The holes vary in size, but some lead to a large cave system that is detailed further in Geology. Cadmus's holes, resembling that of a sponge, often scare trypophobiacs.

Cadmus's is often hit the hardest by Jupiter's magnetic field, making any sort of compass on Cadmus become incredibly precise.

Cadmus has a light red atmosphere, which is thin.

Orbit and Rotation
Cadmus takes 32 days to orbit Jupiter once and takes 16 hours to perform a Cadmean day. Cadmus's orbit is inclined at around a 25 degree angle, meaning Jupiter rises and sets at an erratic angle.

Geology
Cadmus's geology is a sight to behold. As the moon is covered in gargantuan amounts of caves leading to potentially the center of the moon, geology is also one of the least discovered topics about Cadmus.

Cadmus's caves are covered in a bunch of crystals and things which may or may not look like plants and moss. Traces of nearly every element save for artificial ones (e.x. plutonium), nearly every mineral and just about almost anything can be found inside the caves. The abusing of these materials inside Cadmus is an interest nearly every space mining company wants, but however nothing has been carried out due to NASA's stance on the harvesting of Cadmus.

Robots sent to Cadmus have gotten lost in the caves due to it's entrancing mysteries. However, they almost always never come back due to something.

Trivia

 * Cadmus's surface was created by overlaying an image of a sponge's texture over a map of Io and tinting it red, then highly contrasting it.