Species profile
Purple Spotted Gudgeon
Mogurnda mogurnda
Semi aggressive
Moderate care
180 L minimum aquarium
12–15 cm adult size
Bottom–mid
Minimum group: 2
About this species
General notes for hobby use.
Broadly tolerant of water chemistry, but its predatory mouth and territorial breeding behaviour need to be reflected in compatibility advice.
Water parameters
Suggested general range for long-term care.
Temperature
20–28 °C
pH
6.5–8
GH
5–20 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: 2
Tank zone
Bottom–mid
Territory level
Moderate
Predation risk
Small fish
Bioload factor
2
Robust predatory gudgeon. Usually manageable with similarly sized sturdy fish, but small fish and shrimp will be eaten and breeding males defend sites.
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
No
Jump risk
Yes
Natural history & care
Research-backed context for long-term aquarium care.
Lifespan
5–8 years
Diet type
Carnivore
Minimum aquarium volume
180 L
Minimum footprint
100 × 40 cm
Accepted scientific name
Mogurnda mogurnda
Alternative names
Purple Spotted Gudgeon, Northern Purple-spotted Gudgeon
Native range
Northern and eastern Australia and southern New Guinea.
Natural habitat
A wide variety of creeks, billabongs, wetlands and river margins with submerged wood, rock and vegetation.
Diet & feeding
Aquatic insects, crustaceans, worms and small fish; use varied frozen/live foods and quality carnivore pellets.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Males are generally more colourful with stronger fin patterning; females become fuller-bodied when ripe.
Breeding
Substrate spawner. Eggs are attached to rock, wood or other hard surfaces and the male guards and fans the clutch.