Redigobius is a genus of small gobies in family Gobiidae, distributed across estuaries, mangrove creeks, and the lower freshwater reaches of rivers throughout the Indo-Pacific, from Madagascar and Mayotte across South and Southeast Asia to Japan, Papua New Guinea, and Australia. The atlas's three species - the girdled goby (R. balteatus), speckled goby (R. bikolanus), and spotfin goby (R. chrysosoma) - are tiny fish, under 2 in, sharing the classic goby build of fused pelvic fins forming a ventral sucking disc that anchors them against current on sand, mud, or rock.
Like most members of this ecological guild, Redigobius species are of modest interest outside specialist brackish and native-fish circles, where their bold, territorial behavior over a small home substrate makes them engaging nano-tank subjects for keepers willing to replicate estuarine conditions. Two atlas species are rated Least Concern and one has not yet been formally evaluated, consistent with a genus that is locally common across a very broad range but has not drawn much dedicated conservation study.