Taxonomy & naming
Pseudogobiopsis lumbantobing was described by Larson, Hadiaty & Hubert (2017) and is listed as valid by the Catalog of Fishes with the type locality Sungei Kluet in northwest Sumatra. The genus contains gobies of Southeast Asian freshwater and estuarine habitats.
Morphology
FishBase gives a maximum of 1.5 in SL for this species. As in other gobies the pelvic fins are fused into a sucker disc. A detailed colour description has not been compiled here.
Habitat
FishBase describes a freshwater species of rivers and streams at low altitudes of 16–72 ft, over a bottom of sand, gravel, rock and boulders, with algae and aquatic plants sometimes present. It is listed as demersal and is known from Indonesia. The type locality is Sungei Kluet in northwest Sumatra. Measured water chemistry has not been published.
Feeding
The diet has not been described for this species.
Mating
Mating has not been described for this species.
Breeding
Breeding has not been described for this species.
In the aquarium
Husbandry has not been documented for this species. Keepers should treat it as a small, unstudied stream goby, with clean water and a sand, gravel and rock bottom to match its habitat, and not assume that general goby guidance applies.
Conservation
The species has not been assessed by the IUCN. Its range and population status have not been studied since its description in 2017.