Yup, nice fish. "Man made" fish, actually a line bred golden "sport" so not a monster, often seen under the invalid name Barbus schuberti. Like most barbs, they are somewhat sensitive to water conditions and go nose down if they are off. In good water, they are easy to keep and feed.
They are not as active as some other barb species, the tend to drift about sedately. A peaceful fish that is no bother. Like their green bretheren, they tend to prefer slightly cooler water then some other species, 21C or thereabouts is great. They will be okay at higher, but start to suffer if it gets to say 26 - 27C, often blood flecks appear on the body if kept to warm.
In good conditions, the females grow to 100mm or more, males up to 25mm less, but typically they do not reach this size. Allow for 75mm per fish and the sexual dimorphism will correct for things.
Females are also deeper and wider as is typical. They are predominantly yellow with a liberal sprinkling of fine dark dots. Good females have some red in the fins.
Males tend to have more dark markings. The dots tend to be concentrated onto the upper flank where they form oblique lines. In really good males, they can almost appear striped. Fins show a lot more red, in good fish, solid red. Also some guanine crystals appear which can give the "greenish flash" at the right angle. I've noticed that some males have decidedly pointed caudal lobes, others less pronounced, but in most cases, more pointed then the generally rounded lobes of the females caudal.
In clean soft water well fed pairs develop a pinkish red colouration over the abdomen, this is normal and indicates they are in breeding condition. It is useless to attempt spawning if this colouration is not present. A well conditioned good sized adult pair that have been held in sexually segregated quarters rarely fail to spawn after a night together in a 1m breeding tank. Although the fish are quite large, the eggs are numerous and small, so the fry take a bit of rearing as they do tend to need Liquifry or similar for a couple of weeks before moving onto larger food. That said, they are reasonably easy to spawn.