Can Harlequin Rasbora and Madagascar Rainbow live together?

Harlequin Rasbora and Madagascar Rainbow are possible with care. The comparison on this page runs the same compatibility engine as the tank builder, checking temperature and pH overlap, predation by size, temperament, and known hard-pair conflicts.

Species Comparison

Harlequin Rasbora vs Madagascar Rainbow

Harlequin Rasbora

Trigonostigma heteromorpha

Madagascar Rainbow

Bedotia geayi

Verdict:Possible with care

Side-by-side specs

Rasboras

Family

Rainbowfish

2″

Adult size

4″

15gal

Min tank

30gal

72–81°F

Temperature

68–75°F

6–7.5

7–8

peaceful

Temperament

peaceful

Schooling

mid

Water level

mid

Compatibility notes

warnHarlequin Rasbora and Madagascar Rainbow only narrowly overlap in temperature — keep within 72–75°F.

Try both in the builder →Compare different species