Compatibility brief
Can Green Terror live with Guppy?
Risky. This mix is commonly discouraged for typical setups.
Compatibility score
Profile confidence: medium
Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.
300L
Combined minimum footprint reference for these two species: about 300L (larger active fish often want more length).
Green Terror (30cm adult) may treat small Guppy (~5cm) as food once grown — plan adult sizes, not shop sizes.
Green terrors are large, assertive cichlids; guppies are small, bright livebearers that read as prey and as flare triggers. Fishori’s live verdict is RISKY for that aggression and size mismatch. Keepers who add guppies as “dither” for a juvenile terror commonly lose them as the cichlid claims territory. This is not a filtration or décor problem — it is a predator–prey and temperament conflict. Keep green terrors with appropriately robust tank mates, not ornamental livebearers.
Assessment details
Aggression mismatch
Top issueGreen Terror is aggressive, while Guppy is peaceful. The aggressive fish will likely bully or harm the peaceful one.
Green Terror may eat Guppy
Green Terror (30cm) is predatory and Guppy (5cm) is small enough to be eaten. This pairing is unsafe.
Compatible temperature range
Both fish can comfortably share similar water temperatures.
“Green Terror is aggressive, while Guppy is peaceful”
Aggression mismatch
Next steps
Concrete changes, not "research more" filler.
- •Do not stock guppies with green terrors. Keep guppies in a peaceful livebearer community, and keep green terrors in a species-focused or large-cichlid setup.
- •Green Terror reaches ~30cm: tank length and turning room matter more than the litre number. A tall, short tank of the same volume is not equivalent.
Try instead
- →Build a species-only tank for the larger fish, or restock with fish too large to be eaten at adult sizes.
- Seriously Fish. Andinoacara rivulatus
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Andinoacara rivulatus
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Andinoacara rivulatus
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
- Seriously Fish. Poecilia reticulata
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Poecilia reticulata
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Poecilia reticulata
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
- Wikipedia. Guppy
Encyclopaedia overview; use specialist aquarium sources for your stock's real temperature/pH/footprint needs.
Try this next
Build the full stocking list with Green Terror + Guppy
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.