Apologies for the not so great photos. These fish seem to build their nests in the most inaccessible parts of the tank. Also the male is not particularly comfortable with me being near his fry, so he was understandably not at his best in the below pictures.
There must be something in the water. Along with this spawn, I also have had spawns from my Betta hendra, Betta brownorum and Betta stiktos pairs over the past few days. My group of Betta persephone have also been nesting non-stop since I threw some spare film canisters into their tank.
Hailing from Melbourne, Australia, I currently keep and breed a number of species from the coccina complex.