Halfmoon Betta splendens.
Halfmoon given the name because Betta splendens has a half-circle-shaped tail (18oO), so it looks like a half months. In addition, there is also the expanse of Halfmoon tails more than 18oO (over Halfmoon or OHM).
Hickey Halfmoon.
Has a tail like a half months
Source: Agromedia Pustaka, 2008
