Known only from headwaters of the Sungai (river) Amandit, a tributary of the larger Barito basin in the Meratus mountain range, Kalimantan Selatan (South Kalimantan) province, Indonesian Borneo.

There currently exist 36 officially-described members of the genus, all of which are endemic to the island with over half restricted to a single river basin or sub-basin.

This species is almost unheard of in the hobby with the specimen pictured above the only one we're aware of. It was imported into the United Kingdom in late 2011 as bycatch among a shipment of mastacembelid eels from northern India, and the identification was subsequently confirmed by Justin Havird, senior author of the most recent revision of the genus.

This species probably hasn't been seen in the trade yet but should make an interesting aquarium fish if it ever becomes available. Within the genus it's most similar to S. surrufus and S. mele from which it differs only in terms of meristics. In description it's distinguished from the former only by possession of more teeth in the upper jaw although images of live specimens depict S. surrufus as a more intensely-coloured, reddish fi…

This species has been traded for a number of years, though not always under the correct name. We've seen it on sale as S. elegans or S. atropurpureus on numerous occasions, for example, and other trade names include 'Sumatran blue neon goby', 'cobalt blue goby' and 'freshwater neon goby'. Further confusion has arisen because other species are sometimes sold as S. semoni meaning identification has not always been easy and there …

This species was referred to as S. sp. ‘orange fin’ or S. sp. ‘ST01’ prior to being offically named and is one of the more commonly-traded members of the genus, though often in batches containing only one gender, a mixture of species, or misidentified under an incorrect name such as S. zebrinus.

It can be told apart from congeners by the following combination of characters: usually 9 soft second dorsal-fin rays; 15 soft pectoral-fin rays; first dorsal-fin in male poin…

Much of the natural diet is likely to be composed of benthic algae plus associated micro-organisms which are rasped from solid surfaces.

In captivity it will accept good-quality dried foods and meatier items like live or frozen bloodworm but may suffer internal problems if the diet contains excessive protein.

Home-made foods usi…

Many loaches from the families Nemacheilidae, Balitoridae and Gastromyzontidae are also suitable but research your choices before purchase in order to be sure as some are excessively aggressive or otherwise competitive.

Gastromyzon spp. tend to exist in lo…

One of the more commonly-traded members of the genus and often found in mixed shipments which may contain other Gastromyzon spp. or related fishes like Beaufortia kweichowensis. These are typically labelled ‘Borneo sucker’, ‘Hong Kong pleco’, ‘butterfly loach’, etc. regardless of species.

It’s sometimes misidentified as G. punctulatus, a species not currently traded which possesses yellow finnage and a lighter-coloured, less-intensely spo…

It can be distinguished from congeners by the following combination of characters: gill slit angular; presence of subopercular groove, running continuous to origin of pectoral-fin; body black with numerous, small, evenly-spaced light brown spots; head dorsum black with numerous cream spots; pectoral and pelvic fins with cream spots; caudal-fin with iridescen…

Some individuals do appear very similar to G. farragus, with noticeable spotting on the head, but can usually still be told apart by examining the caudal-fin which tends to contain only a single thick, dark vertical bar in G. farragus whereas in G. ocellatus there are more often two bars, one thick, one thinner. Intermediate forms do exist though meaning identification is sometimes tricky.