Species profile
Scatophagus Argus
Scatophagus argus
Peaceful
Hard care
700 L minimum aquarium
25–35 cm adult size
Midwater
Minimum group: 6
About this species
General notes for hobby use.
Large schooling brackish/marine fish. Dorsal spines are reported to be mildly venomous; handle with care.
Water parameters
Suggested general range for long-term care.
Temperature
20–28 °C
pH
7.5–8.5
GH
12–25 dGH
KH
Not yet documented
Flow preference
Moderate–high
Data confidence
Verified
Behaviour
General behaviour traits used by TanksConnected compatibility checks.
Minimum group size
Minimum group: 6
Tank zone
Midwater
Territory level
Low
Predation risk
Small fish
Bioload factor
4
Best in groups of six or more; fast active fish that can be semi-aggressive within the shoal.
Compatibility flags
Quick cautions for common tank-planning issues.
Fin nipper
No
Plant safe
Caution
Shrimp safe
No / caution
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
700 L
Minimum footprint
180 × 60 cm
Accepted scientific name
Scatophagus argus
Alternative names
Spotted Scat, Green Scat
Native range
Indo-Pacific coastal, estuarine and lower-river systems.
Natural habitat
Juveniles inhabit brackish estuaries and mangroves; adults do best at high brackish to marine salinity. Use a 180 cm+ tank with robust filtration and high oxygen.
Diet & feeding
Strong vegetable/algal component plus quality pellets and varied frozen foods; aquatic plants are likely to be eaten.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Reliable external sexing is not established.
Breeding
Home-aquarium breeding is not established; spawning is associated with marine/coastal phases.