Paedocypris progenetica

Paedocypris progenetica (also known as Indonesian Superdwarf Fish) is a tiny, significantly transparent fish. The binomial name originates from the Greek Paideios, meaning children, and Cypris, meaning Venus, a common suffix for the cyprinid genera. The species is native to Indonesia and Malaysia and found in peat swamps and slow flowing blackwater streams. It was first discovered by Singaporean ichthyologist Heok Hui Tan in 2006.

It is one of the smallest known fish in the world, with a mature adult reaching a length of 6.69 mm. It held the record for the shortest known vertebrate until the frog Paedophryne amauensis was formally described in January 2012.