Half Moon (HM) Betta

The Halfmoon Betta has a tail with a spread that is at least 180 degrees between the top and the bottom tail rays.

Any tail spread that do not reach the 180 degrees ray spread is referred to as a Delta Betta.

The ideal Halfmoom Betta tail should look like a large capitol "D", or about a half of the moon, or half of a full circle.

This tail fin type can be found on both long fin and short finned Bettas.