Harlequin Shark tank mates
Labeo cyclorhynchus
6 rated pairings from the Harlequin Shark care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Harlequin Shark needs at least 55 gallons on its own; every companion adds to that.
Good matches
5 · Compatible with normal care — watch space and numbers.
Tiger Barb
Puntigrus tetrazona
20 gal min · 3" adult · Semi-aggressive
Fast-moving and robust enough to avoid harassment; occupies mid-water zones
Denison Barb
Sahyadria denisonii
55 gal min · 6" adult · Peaceful
Active schooling fish that stays out of the shark's territory
Rosy Barb
Pethia conchonius
25 gal min · 3.5" adult · Semi-aggressive
Hardy and active, tends to stay in mid-water away from bottom territory
Congo Tetra
Phenacogrammus interruptus
30 gal min · 3.5" adult · Peaceful
Peaceful schooling fish occupying mid to upper zones, unlikely to conflict
Pearl Gourami
Trichopodus leerii
30 gal min · 5" adult · Peaceful
Occupies upper zones and is generally peaceful, reducing territorial conflict
Use caution
1 · Works in the right setup; read the note before combining.Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.