Compatibility brief
Can American Flagfish live with Angelfish?
Caution. Check the issues below before buying.
American Flagfish + Angelfish: Fin nipping risk. American Flagfish is a known fin nipper and Angelfish has long, flowing fins. American Flagfish will likely harass Angelfish.
Compatibility score
Profile confidence: low
Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.
150L
Combined minimum footprint reference for these two species: about 150L (larger active fish often want more length).
Angelfish (20cm adult) may treat small American Flagfish (~6cm) as food once grown — plan adult sizes, not shop sizes.
American Flagfish is a fin nipper and Angelfish is vulnerable to nipping — long fins are a common target even when water parameters match.
Assessment details
Compatible temperaments
Both American Flagfish and Angelfish share a semi-aggressive temperament.
Fin nipping risk
Top issueAmerican Flagfish is a known fin nipper and Angelfish has long, flowing fins. American Flagfish will likely harass Angelfish.
Compatible temperature range
Both fish can comfortably share similar water temperatures.
“American Flagfish is a known fin nipper and Angelfish has…”
Fin nipping risk
Next steps
Concrete changes, not "research more" filler.
- •Avoid keeping American Flagfish with long-finned fish like Angelfish.
Try instead
- →Avoid keeping American Flagfish with long-finned fish like Angelfish.
- Seriously Fish. Jordanella floridae
Primary: species page covering Florida range, temperate temperature tolerance, hair-algae diet, and the strong male territoriality at spawning.
- Aquarium Co-Op. American Flagfish Care
Secondary: retailer guide on the algae-eating role and the long-fin warning.
- Seriously Fish. Pterophyllum scalare
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Pterophyllum scalare
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Pterophyllum scalare
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
Try this next
Build the full stocking list with American Flagfish + Angelfish
Plan further
Try both species in the full-stock tank check, or open either fish profile for mates lists. 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 (American Flagfish): Based on typical aquarium care sources; details may vary between setups.