There are a lot of bad things that can happen to travelers in the Zuran Expanse, not the least of them is falling into the hands of the people of Algos. They're often called "algophilists," and though the ancient term was originally synonymous with masochist, the Algosians are not as particular about whose pain they enjoy.
Algosians are disciplined in their pleasure-seeking. There is an almost monastic structure to their society and a purity (if such a word applies) of purpose. They worship the historic torture cult of the Faceless Ones like gods. It's thought that they may in fact be the bioroid creations of those ancient sadists, designed to satisfy their creators' need for playthings who were durable, resilient--and even appreciative. The Algosians learned much from their masters and now apply that knowledge to those that fall into their hands.
Not usually given to direct attacks on vessels, the Algosians rely on kidnappings to get most of their victims. They operate clubs or brothels in some spaceports, though their involvment is usually secret. Some physicians and medical researchers seek them out in an attempt to gain access to their extensive observations on the physiology of various in regard to pain tolerance or pleasure responses.
The Algosians appear as pallid, thin humanoids. They are physiologically similar to baseline humans in most respects but have higher than average constitutions (minimum 12) and resistances to pain. Their natural recovery of hit points is at twice the normal rate, though medical care or biopsionics effect them the same as they would anyone else.