Wow. B'omarr Monks really surprised me. There is so much more to them than those creepy spider droids with jarred brains. The spider droid ISN'T REALLY EVEN the B'omarr Monk! This episode was a lesson learned in weird Star Wars information.
The B'omarr are the monks who built the massive monastery fortress Jabba the Hutt occupies as his palace. They are spider-droids that carry around a nutrient-globe containing a living, sentient brain. These brains are all that remain of the enlightened monks.