Nice try! The correct answer is that all spiral galaxies are fermions. There are no fermions that are not either matter or anti-matter type; ours is matter. Somewhere out there is an anti-matter galaxy that would have been created at the same time as ours. That's why the JWST is finding fully-formed galaxies in the earliest regions it looks.

In fact, all celestial objects are observably either fermions or bosons:

https://brianpd.medium.com/there-is-no-dark-matter-e082599fefbc