Did you know the most abundant vertebrate on Earth often starts life as a male & transitions to female?
Scientists estimate the number of bristlemouth fish range from hundreds of trillions to quadrillions(!) of individuals. https://www.nytimes.com/2015/06/30/science/bristlemouth-ocean-deep-sea-cyclothone.html?smid=nytcore-ios-share&referringSource=articleShare #science #nature