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Compatibility

Compatibility brief

Can Betta live with Serpae Tetra?

Betta

Betta

Betta splendens

semi-aggressive~7cm
Serpae Tetra

Serpae Tetra

Hyphessobrycon eques

semi-aggressive~4cm
VerdictRISKY

Risky. This mix is commonly discouraged for typical setups.

Betta + Serpae Tetra: Known incompatible pairing. Serpae tetras are habitual fin nippers in many community tanks; long-finned bettas are a very high-risk combination.

Compatibility score

30/100

Profile confidence: medium

Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.

Min tank

100L

Combined minimum footprint reference for these two species: about 100L (larger active fish often want more length).

Temperature
Range in °C24–28°C shared
BettaSerpae TetraShared window
pH
Range6.5–7.5 shared
BettaSerpae TetraShared window
Temperament / behaviour

Serpae Tetra is a fin nipper and Betta is vulnerable to nipping — long fins are a common target even when water parameters match.

Assessment details

  1. Known incompatible pairing

    Top issue

    Serpae tetras are habitual fin nippers in many community tanks; long-finned bettas are a very high-risk combination.

  2. Compatible temperaments

    Both Betta and Serpae Tetra share a semi-aggressive temperament.

  3. Fin nipping risk

    Serpae Tetra is a known fin nipper and Betta has long, flowing fins. Serpae Tetra will likely harass Betta.

  4. Compatible temperature range

    Both fish can comfortably share similar water temperatures.

“Serpae tetras are habitual fin nippers in many community…”

Known incompatible pairing

Next steps

Concrete changes, not "research more" filler.

  • •Avoid keeping Serpae Tetra with long-finned fish like Betta.
  • •Serpae Tetra should be kept in a group of at least 8 for best health and behaviour.
Sources from both profiles
Only URLs that exist on the species records are shown. We do not fabricate citations.

Try this next

Build the full stocking list with Betta + Serpae Tetra

Compare another pairOpen tank builder

Plan further

Check each species’ mates list, size the glass, then verify the full stock in the builder. Methodology explains how verdicts are produced.

Individual fish vary in personality. Fishori uses conservative hobby rules. Observe any new introduction closely, feed thoughtfully, and keep a quarantine or backup plan. This is not veterinary advice.

Profile data confidence: high. Checked against several solid care sources that mostly agree.

Full tank-mate guides

Related pair checks

Betta + Serpae Tetra — common questions

Can Betta live with Serpae Tetra?
For most keepers, no. The verdict is RISKY: at least one check fails hard for a typical home tank. Choose a different pairing, or read the assessment details on this page to see exactly what fails before deciding.
What tank size do you need for Betta and Serpae Tetra together?
Plan around 100 litres as the working minimum. That figure comes from each species' published minimum and their group needs, and it assumes adult sizes, not shop sizes.
What's the main risk?
Known incompatible pairing. That is the check that fails outright for this pair. The matching entry under assessment details on this page explains the reasoning and the numbers behind it.
What should you check before buying?
Avoid keeping Serpae Tetra with long-finned fish like Betta. Serpae Tetra should be kept in a group of at least 8 for best health and behaviour.