Betta uberis, is one of my favourite species from the coccina complex. The males are simply magnificent when in full display, with their sail fin dorsals and spectacular green iridescence. The females have slightly more subdued colouring, but display quite nicely during courtship.
Like all members of this complex, Betta uberis is a small fish, with fully mature specimens measuring around 4cm total length. Females usually do not grow as big as the males, and the sexes are easily told apart. I could sex my juveniles once their adult colouration developed without much difficulty.
Based on my personal experience, the males of this species (particularly dominant individuals) can be highly aggressive towards each other, and so I would advise a minimum tank size of 40 litres if one plans on housing multiple males together.
I have not found these fish particularly difficult to spawn. If provided with an appropriate tank environment and a diet rich in live foods, they will prove quite prolific, spawning with astounding frequency.
Like most fish from this complex, I find the healthiest fry are those that are reared alongside the adults. The parents usually do not bother the fry, though predation will occur from older siblings.
One of the more commonly available species from this complex, this should not detract from its beauty. Very similar to Betta burdigala in appearance, Betta uberis is a species I think anyone who is interested in the coccina group of betta should try at least once.
Hailing from Melbourne, Australia, I currently keep and breed a number of species from the coccina complex.