The Red-Spotted Pygmymgoby (Trimma readerae) is arguably the nicest of the many red-spotted species in this genus, though, in spite of its dashing good looks, it wasn’t scientifically described until 2015. There’s still much that we have yet to learn about it. Thus far, it’s known primarily from around Australia and nearby portions of Papua New Guinea, but similar specimens have been reported from all across the West Pacific, including Indonesia, Japan and even the Marshall Islands.
This species is usually found in back reef leeward areas
Winterbottom, R. and D.F. Hoese, 2015. A revision of the Australian species of Trimma (Actinopterygii, Gobiidae), with descriptions of six new species and redescriptions of twenty-three valid species.