Species profile
Silver Hatchetfish
Gasteropelecus sternicla
Peaceful
Moderate care
100 L minimum aquarium
4–6.5 cm adult size
Top
Minimum group: 10
About this species
General notes for hobby use.
Extreme jumper. Every cable/filter gap must be blocked.
Water parameters
Suggested general range for long-term care.
Temperature
23–27 °C
pH
5.5–7
GH
2–15 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
Territory level
None
Predation risk
Tiny fry
Bioload factor
0.6
Timid surface shoaler; ten or more is better than the bare minimum six.
Compatibility flags
Quick cautions for common tank-planning issues.
Fin nipper
No
Plant safe
Yes
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
Carnivore
Minimum aquarium volume
100 L
Minimum footprint
80 × 30 cm
Accepted scientific name
Gasteropelecus sternicla
Alternative names
Common Hatchetfish, River Hatchetfish
Native range
Northern South America, including Amazon/Orinoco-linked and Guiana Shield drainages.
Natural habitat
Slow surface waters under overhanging vegetation. Use floating cover, subdued lighting, gentle flow and a completely sealed lid.
Diet & feeding
Surface-oriented diet of insects and small invertebrates; use floating microfoods, small frozen foods and occasional cultured insects.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Females may appear fuller-bodied when gravid; otherwise difficult to sex.
Breeding
Rarely bred in home aquaria; likely scatters eggs around surface/floating vegetation in very soft acidic conditions.