Originally Posted by ChoclateBetta
What do you mean Enviremental Pollution?
I mean runoff from factories, environmental disasters like oil spills, pharmaceuticals that haven't broken down in urine (female hormonal contraceptives, for example, are not broken down), people dumping chemicals into their lawns, the palm oil plantations screwing up natural betta habitats, etc. This all adds up in the water we drink and that bettas live in. There has been a noticeable uptick in fish and amphibian species becoming hermaphroditic or turning into a different sex in waters that are affected by pollution around the world. And some of it is natural. Hermaphroditic traits and mutations occur in nature. Being able to reproduce as either sex is helpful to survival.
Another complicating issue for bettas is that if young males are left together for too long and water isn't changed enough, they emit high concentrations of a hormone that stunts growth. It's possible that this hormone has feminizing qualities that encourage the growth of female features too. Also, temperature changes during development in the egg could cause hermaphroditism.