There’s a whole world of fancy betta fish breeding out there where people selectively breed these fish to produce some incredible color combinations. This one is called a Dragon Fancy Orange Halfmoon Plakat.
Spadetail Betta: The Spadetail has an equal spread on either side of the fin, similar to a Roundtail, but with tail finishing in a point rather than a rounded edge. The bottom fins are straighter and pointier. Caudal has a wide base that narrows to a delicate point. http://betta-plakat.blogspot.com/2011_06_01_archive.html