Paedocypris progenetica

Paedocypris progenetica (also known as Indonesian Superdwarf Fish) is a species of tiny cyprinid fish endemic to the Indonesian islands of Sumatra and Bintan where it is found in peat swamps and slow flowing blackwater streams. It was discovered by Singaporean ichthyologist Heok Hui Tan in 2006. He has written a description of the fish along with another species of the same genus called Paedocypris micromegethes.

It is one of the smallest known fish in the world, together with species such as Schindleria brevipinguis, with the females reaching a maximum standard length of 10.3 mm (0.41 in), and the males reaching a maximum st 9.8 mm (0.39 in) and the smallest known mature specimen, a female, measuring only 7.9 mm (0.31 in). It held the record for the shortest known vertebrate until the frog Paedophryne amauensis was formally described in January 2012, and the parasitic males of the anglerfish Photocorynus spiniceps are only 6.2 millimetres (0.24 in) long.

The fish's diet consists of small planktonic rotifers and cladocerans.