Lucifrins

Lucifrins are a medium race of subterranean humanoids with translucent flesh and bioluminescent blood. While a number of creatures that live in the cavern layer have already lost the power of sight, those that have not have eyes very sensitive to the Lucifrins' lights and can easily become confused or mesmerized by their controlled patterns of glowing.
== Biology ==
The Lucifrin skeletal structure is quite similar to that of humans with the only noticeable deviations being that their hands and feet have three digits instead of five and their shoulders possessing additional prongs; however, a quick observation of their internal organ structure, which is possible to view through their translucent flesh, reveals significant divergence from the human form. The primary difference in their internal structure is that their intestines branch off in two separate pathways that rise up through their torse and wrap around their shoulder prongs. As much of their regular diet consists of bioluminescent mushrooms, this digestive tract is illuminated at most times, but changes in their diet can reduce its natural visibility. The Lucifrin circulatory system is also distinctly outlined due to their naturally bioluminescent blood, but changes to their ordinary diet will not impact the radiance of their blood unless they are malnourished, in which case it will begin to dim. In addition to a regular network of arteries and veins, lucifrins possess a series of vesicles in which they can deliberately pool their blood scattered throughout their body, including two larger sacs on their torso. One of these sacs is almost completely opaque and lies at the bottom of their stomach; it large enough that can be inflated to hold most of the excess blood in their system should they need to obscure themselves. The other sac is centered around their heart and can be filled to concentrate their natural luminance into one radiant area. 
== Psychology ==
Describe general personality traits that are considered common among the species as a whole
== Society ==
Describe the structure of their society and relationships between members of their own species as well as other species of Ib
== Other ==
Other important characteristics of a species should be highlighted here such as unique developmental or cultural traits that are important enough to be explained in a separate section.
== Variants ==
Describe various subspecies