Beholders

Beholders resemble floating orbs of flesh with a large mouth, single central eye, and lots of smaller eyestalks on top with deadly magical powers.
Beholders in the Spelljammer campaign are common antagonists, like the deadly neogi and sadistic illithids. However, one thing prevents them from being the most dangerous faction in wildspace: the beholders are engaged in a xenophobic civil war of genetic purity.
There are a large number of variations in the beholder race with some sub-races having smooth hides and others chitinous plates. Other noticeable differences include snakelike eyestalks or crustacean-like eyestalk joints. Some variations seem minor such as variations in the size of the central eye or differences in skin colour. Each beholder nation believes itself to be the true beholder race and sees other beholders as ugly copies that must be destroyed.
Beholders use a large number of different ship designs. Some of these ships feature a piercing ram but others have no weaponry. All beholder ships allow a circuit of beholders to focus their eye stalks into a 400 yard beam of magical energy. These ships are powered and navigated by the orbus (plural "orbii") race of beholders, who are stunted, albino, and very weak in combat. Hive mothers are even rarer than elder orbs. Although their name implies a feminine gender, these beholders are as gender-neutral as typical members of their species. Their name stems more from the fact that they have the ability to magically dominate other beholders.
The beholders are a hateful, aggressive and avaricious race, attacking or dominating other races, including other beholders and many of the beholder-kin. This is because of a xenophobic intolerance among beholders that causes them to hate all creatures not like themselves. The basic, beholder body-type (a sphere with a mouth and a central eye, eye-tipped tentacles) allows for a great variety of beholder subspecies. Some have obvious differences, there are those covered with overlapping chitin plates, and those with smooth hides, or snake-like eye tentacles, and some with crustacean-like joints. But something as small as a change in hide color or size of the central eye can make two groups of beholders sworn enemies. Every beholder declares its own unique body-form to be the true ideal of beholderhood, the others being nothing but ugly copies, fit only to be eliminated.