Species Profile
Species Library

Buenos Aires Tetra

Accuracy: Verified
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This profile has completed research review. Source-backed care information is shown below. Final publication checks are still pending.
Species profile

Buenos Aires Tetra

Psalidodon anisitsi
Semi aggressive Easy care 120 L minimum aquarium 6–8 cm adult size Midwater Minimum group: 6

About this species

General notes for hobby use.

Robust active tetra that can nip long fins and eat soft plants; best in a substantial shoal with similarly lively tankmates.

Water parameters

Suggested general range for long-term care.

Temperature 15–27 °C
pH 6–7.5
GH Up to 18 dGH
KH Not yet documented
Flow preference Moderate
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 Tiny fry
Bioload factor 1
Fast, assertive schooling tetra. Group size helps but does not make it an ideal companion for slow or elaborate-finned fish.

Compatibility flags

Quick cautions for common tank-planning issues.

Fin nipper Yes / caution
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 120 L
Minimum footprint 90 × 35 cm
Accepted scientific name Psalidodon anisitsi
Alternative names Buenos Aires Tetra, Hyphessobrycon anisitsi, Astyanax anisitsi
Native range
Paraná–Paraguay drainage region of South America, including Argentina, Paraguay and southern Brazil.
Natural habitat
Rivers, streams and associated floodplain waters across a broad subtropical range.
Diet & feeding
Opportunistic omnivore taking invertebrates and substantial plant material; soft aquarium plants are readily eaten.

Breeding & sexing

Research-backed guidance for identifying sexes and reproductive behaviour.

Sexing
Females are generally fuller/deeper-bodied when mature; males tend to be slimmer.
Breeding
Prolific egg scatterer; adults provide no parental care and may consume eggs.