Siamese fighting fish  (aka Betta fish) are known to be very territorial and can be aggressive. Their natural behaviour is sometimes why some chose to keep a betta fish alone in a small aquarium. However, this doesn't mean that they can't coexist with other fish. 

Suitable tankmates include:

- Tetra 

- White Cloud Mountain Minnows

- Rasbora 

- Kuhli loach

- Snails

See our blog post on how to integrate your betta fish into a community tank.