Let me reiterate; this is a FISH, not a BEET! It is a BETTA (two "t's," pronounced BET-uh) not a BETA (one "t," pronounced BAY-tuh). Beta is the genus name for beets, while Betta is this fish's genus name.
Which fish can live with bettas? Betta fish can be very territorial - they don't get called fighting fish for nothing! But knowing a few simple facts you will be able to have you betta co-existing with other fish peacefully.
Top 15 Beautiful Types of Betta Fish with Amazing Pictures