The world’s smallest fish species, Paedocypris progenetica, is a tiny freshwater fish from the peat swamp forests of Indonesia. Measuring only 7.9 mm (0.31 inches) at adulthood, it is one of the smallest vertebrates on Earth. With a nearly transparent body, it blends effortlessly into its environment and thrives in extremely acidic waters with a pH as low as 3. First documented by sci... https://fishingproo.com/worlds-smallest-fish-species/