Sagittarius is a zodiac sign represented by a mythical half-human and half-animal figure, the archer. Although not an actual animal symbol, Sagittarius is often associated with many animal spirits in western astrology. There are several spirit animals that are commonly associated with Sagittarius, including:

1. Wild horse: This animal embodies the adventurous, free-spirited nature of Sagittarius. It represents the Sagittarian trait of galloping with wild abandon towards new adventures.

2. Owl: This animal represents the wisdom and radiance of Sagittarius. Both Sagittarius and owls are majestic and composed.

3. Horse: Sagittarians are represented by the horse spirit animal. They have so many brilliant ideas that they can’t possibly hold on to them all. Rather than waiting for permission and assistance, they freely express their ideas to others and manage to go over whatever challenges they encounter on their own.

4. Rat: In Chinese astrology, the rat is associated with Sagittarius. This is because they’re also gregarious, outgoing, and social people who enjoy getting out and having a fun time.

5. Wolf: This animal represents the Sagittarian trait of being a loyal friend. Sagittarians are known for their warm and understanding nature, making them the perfect companion on any journey.

In conclusion, while the mythical centaur/archer is the traditional astrological symbol for Sagittarius, there are several spirit animals that embody the traits of this zodiac sign.