Species profile
Rhinogobius Wui
Rhinogobius duospilus
Semi aggressive
Moderate care
60 L minimum aquarium
4–5 cm adult size
Bottom
Minimum group: 4
About this species
General notes for hobby use.
Rhinogobius wui is an old synonym/trade name for R. duospilus, but imports sold under that name can contain several related species. This profile applies to confirmed R. duospilus.
Water parameters
Suggested general range for long-term care.
Temperature
15–25 °C
pH
6.5–7.8
GH
4–15 dGH
KH
Not yet documented
Flow preference
High
Data confidence
Verified
Behaviour
General behaviour traits used by TanksConnected compatibility checks.
Minimum group size
Minimum group: 4
Tank zone
Bottom
Territory level
Moderate
Predation risk
Shrimp fry
Bioload factor
0.7
Rheophilic bottom goby. Males defend rock cavities but a small group works with abundant stones, sight breaks and high oxygenation.
Compatibility flags
Quick cautions for common tank-planning issues.
Fin nipper
No
Plant safe
Yes
Shrimp safe
No / caution
Snail safe
Yes
Cave breeder
Yes
Digs substrate
Yes
Jump risk
Yes
Natural history & care
Research-backed context for long-term aquarium care.
Lifespan
3–5 years
Diet type
Carnivore
Minimum aquarium volume
60 L
Minimum footprint
60 × 30 cm
Accepted scientific name
Rhinogobius duospilus
Alternative names
Rhinogobius wui, Wui Goby, White-cheek Goby, Hong Kong Goby
Native range
Southern China and Hong Kong region; aquarium imports labelled R. wui may also contain other members of the R. duospilus complex.
Natural habitat
Cool clear freshwater streams over stone, gravel and sand with appreciable current and very high oxygenation.
Diet & feeding
Small insect larvae, crustaceans and benthic invertebrates; frozen bloodworm, Artemia and similar foods are useful, while flakes alone are inadequate.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Males show stronger cheek/body colour and more pointed dorsal fins; females are plainer and fuller when gravid.
Breeding
Cave spawner. Male guards eggs beneath stones or inside cavities; true R. duospilus is fluvial and can complete development in freshwater.