Paedocypris
Paedocypris is a genus of cyprinid fish found in Southeast Asia, where it occurs in the Philippines, Malaysia, and Indonesia.
Paedocypris progenetica has been claimed to be the smallest known species of fish in the world. The smallest mature female measured 7.9 mm and the largest known individual 10.3 mm.
Species
The three currently recognized species in this genus are:
Paedocypris carbunculus Britz & Kottelat, 2008
Paedocypris micromegethes Kottelat, Britz, H. H. Tan & K. E. Witte, 2006
Paedocypris progenetica Kottelat, Britz, H. H. Tan & K. E. Witte, 2006
Taxonomy
Two species were discovered and identified by ichthyologists Maurice Kottelat from Switzerland and Tan Heok Hui from the Raffles Museum of Biodiversity Research and the National University of Singapore in 1996. Their osteology was studied by Ralf Britz at London's Natural History Museum. In 1994, the same ichthyologists had already discovered in Sarawak (Malaysian part of Borneo) another miniature species of the same genus Paedocypris. Like P. progenetica, P. micromegethes was found in the slow-flowing blackwater streams and peat swamps.