Species profile
Spotted Blue-eye
Pseudomugil gertrudae
Peaceful
Moderate care
60 L minimum aquarium
3–4 cm adult size
Top mid
Minimum group: 10
About this species
General notes for hobby use.
Small, peaceful blue-eye that looks and behaves best in a large group with dense cover.
Water parameters
Suggested general range for long-term care.
Temperature
23–29 °C
pH
5–7
GH
1–12 dGH
KH
Not yet documented
Flow preference
Low–moderate
Data confidence
Verified
Behaviour
General behaviour traits used by TanksConnected compatibility checks.
Minimum group size
Minimum group: 10
Tank zone
Top mid
Territory level
None
Predation risk
Tiny fry
Bioload factor
0.45
Shoaling species with frequent male displays. Ten or more gives better confidence and social behaviour.
Compatibility flags
Quick cautions for common tank-planning issues.
Fin nipper
No
Plant safe
Yes
Shrimp safe
Yes
Snail safe
Yes
Cave breeder
No
Digs substrate
No
Jump risk
Yes
Natural history & care
Research-backed context for long-term aquarium care.
Lifespan
Not yet documented
Diet type
Omnivore
Minimum aquarium volume
60 L
Minimum footprint
60 × 30 cm
Accepted scientific name
Pseudomugil gertrudae
Alternative names
Spotted Blue-eye, Gertrude's Blue-eye
Native range
Northern Australia, southern New Guinea and nearby islands/localities.
Natural habitat
Vegetated creeks, swamps, lagoons and backwaters. Provide plants, fine cover, gentle current and a secure lid.
Diet & feeding
Tiny dry foods plus regular Artemia, Daphnia and other small live/frozen foods.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Males have longer patterned fins and stronger colour; females are smaller-finned and plainer.
Breeding
Adhesive eggs are deposited daily among fine plants or mops; separate eggs/fry from adults for reliable yield.