Zhou's Scarlet Goby Care Guide
Rhinogobius zhoui · Freshwater Fish
What Zhou's Scarlet Goby look like
Rhinogobius zhoui, commonly known as Zhou's Scarlet Goby, is a diminutive freshwater goby characterized by its strikingly vivid scarlet-red coloration, particularly pronounced in males, which can reach a maximum adult size of approximately 3 inches. The body is laterally compressed and fusiform, allowing for agile movement across the substrate. Notable morphological features include a well-developed, rounded head with a terminal mouth equipped with small, conical teeth adapted for a carnivorous diet. The dorsal fin is elongated and continuous, merging seamlessly with the caudal fin, while the pelvic fins are fused into a disc-like structure that aids in substrate adherence. This species exhibits minimal sexual dimorphism beyond the intensity of coloration, with males displaying brighter hues during the breeding season. Defensive adaptations include its ability to blend into the substrate, utilizing its coloration for camouflage against predators in its natural stream habitat.
Behavior & temperament
Zhou's Scarlet Goby is primarily a bottom-dwelling species, exhibiting a solitary to semi-social behavior, often found in small groups within rocky or sandy substrates of freshwater streams. It is not an obligate schooler but may display social hierarchies during breeding periods, where males establish territories. The goby is generally peaceful but can exhibit territorial aggression towards conspecifics, especially during mating rituals. Breeding behavior involves egg scattering, with females laying adhesive eggs on submerged surfaces, which males subsequently guard. This species occupies the benthic zone, foraging primarily along the substrate, and is known for its shy demeanor, often retreating to crevices when threatened.
Diet & feeding
In the wild, Zhou's Scarlet Goby primarily feeds on small invertebrates, including crustaceans and insect larvae. In captivity, it requires a diet rich in protein, consisting of high-quality pellets, frozen or live foods such as brine shrimp and daphnia to maintain optimal health.
Behind the name
Rhinogobius (nose goby); zhoui (named in honor of a researcher or individual associated with the species).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Zhou's Scarlet Goby?
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