Species profile
Black Phantom Tetra
Megalamphodus megalopterus
Peaceful
Easy care
70 L minimum aquarium
3.5–4.5 cm adult size
Midwater
Minimum group: 8
About this species
General notes for hobby use.
Peaceful shoaling tetra; males engage in conspicuous display contests without normally causing harm.
Water parameters
Suggested general range for long-term care.
Temperature
22–28 °C
pH
6–7.5
GH
Up to 18 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: 8
Tank zone
Midwater
Territory level
Low
Predation risk
Tiny fry
Bioload factor
0.6
Maintain a decent shoal in a planted aquarium with shaded areas. Male sparring is generally ritualised.
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
70 L
Minimum footprint
75 × 30 cm
Accepted scientific name
Megalamphodus megalopterus
Alternative names
Black Phantom Tetra, Hyphessobrycon megalopterus
Native range
Upper Paraguay and Guaporé river basins in South America.
Natural habitat
Vegetated South American freshwater habitats; subdued light and plant cover suit normal behaviour.
Diet & feeding
Feeds on worms, small insects and crustaceans and readily accepts quality prepared foods.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Males are darker with more developed fins; females show more reddish colour and a fuller body.
Breeding
Egg scatterer; adults should be removed from a dedicated breeding tank because they may eat eggs.