Groper and life of fasting

How does life go in a subterranean hole? The milky, slender scud Niphargus would know. This creature has several characteristic features that are often shared by other inhabitants of such habitats (called Troglomorphisms). 

The most obvious are elongated legs lined with sensory bristles that act as a blind man's cane. Niphargids didn't face evolutionary pressure to maintain their eyes, so their eyes aren't the strongest and have been reduced in size. 

Food sources are also limited, meaning that Niphargids typically experience a period of fasting. By slowing down their metabolic pathways, they cope with this period in a sort of blunted state. Among other consequences, this adaptation results in a modified rate of oxygen exchange. And it's no secret that this could be advantageous in places where the anoxic sites can be found. 

Fišer, C., Culver, D.C., White, W.B. (2012): Encyclopedia of Caves. Academic Press: 1–1240. Dostupné z: doi: 10.1016/C2010-0-64793-6.