Compatibility brief
Can Harlequin Rasbora live with Siamese Algae Eater?
Caution. Check the issues below before buying.
Compatibility score
Profile confidence: low
Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.
100L
Combined minimum footprint reference for these two species: about 100L (larger active fish often want more length).
Assessment details
Data or identification limits
Top issueAt least one fish has common trade or ID ambiguity, so the numbers here may not match the individual in the shop.
Compatible temperaments
Both Harlequin Rasbora and Siamese Algae Eater share a peaceful temperament.
Compatible temperature range
Both fish can comfortably share similar water temperatures.
“At least one fish has common trade or ID ambiguity, so the…”
Data or identification limits
Next steps
Concrete changes, not "research more" filler.
- •Harlequin Rasbora should be kept in a group of at least 6 for best health and behaviour.
- Seriously Fish. Trigonostigma heteromorpha
Supports: aquarium size, water chemistry, temperament and compatibility (primary care reference).
- FishBase. Trigonostigma heteromorpha
Supports: taxonomy and wild maximum size — translate to tank stocking, not a target number.
- Wikipedia. Trigonostigma heteromorpha
Supports: general species background and common-name orientation only.
- LiveAquaria. Siamese Algae Eater (care profile)
Primary: retailer care sheet: tank size, water parameters, diet, and use in planted community tanks. Commercial copy may list C. siamensis; trade 'SAE' is often a mix of similar Crossocheilus. Identify the fish, not the bag label alone.
- Planet Catfish. Labeoninae (Crossocheilus and look-alikes)
Primary: Cat-eLog subfamily list for Crossocheilus and related Asian labeonins; the standard reference when separating SAE from Epalzeorhynchos 'flying foxes' and other doppelgängers.
- FishBase. Crossocheilus oblongus
Secondary: species-level taxonomy and size in the wild; reconcile with the fish in your tank, not every shop's name tag.
Try this next
Build the full stocking list with Harlequin Rasbora + Siamese Algae Eater
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: medium. Driven by the lower-confidence profile (Siamese Algae Eater): Typical care sources — trade names for this fish get mixed up, so verify the ID before you buy.