Shibi is a member of the Aburame clan, and the father of Aburame Shino. Like Shino and most other members of his clan, he made a pact with special insects known as Destruction Bugs, in which they live within his body in exchange for their service whenever needed, whether it be to aid in a battle, track enemies, or use for various other reasons. Shibi also seems to be a lot like Shino personality-wise as well; very quiet, doesn't seem to be very social, but has a much bigger knowledgebase than his peers, due to always listening and paying attention to the situation and what's going on around him.
Not very much of him has been seen as of yet in the anime or manga. Though he did show up during the Invasion of Konoha to aid Shino and reverse the harm of the poisonous gas that he had inhaled after his battle with Kankuro. So from seeing that, it's obvious that he has a lot of experience and skill in poison, and he's definitely capable of a lot more than what we've seen of him so far.