Trimmatom nanus
Trimmatom nanus, the midget dwarfgoby, is a species of marine goby native to the Indian Ocean and the western Pacific Ocean. It can mainly be found on oceanic drop-offs at depths of from though it can occasionally be found in outer reef areas and lagoons at depths of from. This species can reach a length of SL.
T. nanus was until 2004 the smallest known fish and vertebrate. The recent discovery of Schindleria brevipinguis relegated it to second place. Later, the discovery of Paedocypris progenetica dropped T. nanus to third place. The record for the smallest known vertebrate being held by the frog Paedophryne amauensis, formally described in January 2012.
