What fish can live with Green Terror?

Use the "Often compatible" lists as a shortlist, not a stocking plan. Always run the pair tool and check the footprint of your actual tank first. Verify behaviour for Green Terror against your own reading before you buy.

What tank mates should you avoid with Green Terror?

Avoid Neon Tetra, Guppy, Corydoras Catfish, Angelfish based on size, temperament, or predation risk on file.

What size tank do Green Terror need for a community?

300L is the planning floor for adult swimming space and bioload headroom. Long-term, a 366L+ tank lets adults use the full footprint without crowding the next species. Footprint, meaning length and front-to-back depth, matters as much as raw volume for active or territorial species.

Green Terror tank mates

A large aggressive cichlid with spectacular teal colouring. Requires species-only or carefully managed setups of 300 L or more.

Evidence: partially verified

Confidence: high

Lists below are built from this species record (safest, best with, risky, unsafe) — each link opens a pair-level check, not a guarantee.

← Full Green Terror profile·Compatibility checker·Tank builder·More cichlid

Best tank mates (on file)

Merged from conservative safest and best with fields — de-duplicated by species.

Common Pleco Pair check
The Green Terror profile lists Common Pleco as both safe and a recommended pairing. Common Pleco grows bigger than Green Terror (60cm vs 30cm). Stock the Green Terror group large enough to outnumber the Common Pleco, or the smaller fish ends up bullied or off food.
Jack Dempsey Pair check
The Green Terror profile lists Jack Dempsey as both safe and a recommended pairing. Jack Dempsey is a aggressive intermediate-care species with a 200L minimum. Run the pair checker for your specific tank before stocking.
Oscar Pair check
The Green Terror profile lists Oscar as both safe and a recommended pairing. Oscar is a aggressive intermediate-care species with a 300L minimum. Run the pair checker for your specific tank before stocking.

Risky or situational

From risky tank mates and broad avoid with (excluding “unsafe” below). May work with species-only setups, more water, or mature systems — read the pair page.

None on file beyond the safe list.

Fish to avoid with Green Terror

From the unsafe list — predation, aggression, or space rules on this profile.

Neon Tetra See why (pair)
Green Terror is flagged as predatory or as likely to eat small fish, and Neon Tetra at 4cm is well within an adult Green Terror's gape.
Guppy See why (pair)
Green Terror is flagged as predatory or as likely to eat small fish, and Guppy at 5cm is well within an adult Green Terror's gape.
Corydoras Catfish See why (pair)
Green Terror is flagged as predatory or as likely to eat small fish, and Corydoras Catfish at 6cm is well within an adult Green Terror's gape.
Angelfish See why (pair)
Angelfish conflicts with Green Terror on temperament, predation, or footprint. The juvenile size in a shop tank is not the figure that matters here.

Tank size and groups

Published minimum for Green Terror: 300L — group minimum 1 .
Compatibility changes when the tank is too short for turning, too little for a real school, or too warm for one species and not the other — that is why pair checks include tank context, not only temperament.
Nearest litre hub to this minimum: 300L hub.

Easier alternatives to consider

Conservative beginner-peaceful picks from the library — not replacements for reading, but a shorter on-ramp than this species for a first tank.

Plan before you buy

Pair checks for every mix, then multi-species stocking in the builder.

Open compatibility checker Tank builder

Filtration & heating

A 300L minimum tank for Green Terror needs a filter rated for at least 1200L/hr turnover and a heater maintaining 22–26°C.

Filter buying guide →Heater buying guide →Beginner plants guide →

Related (care + temperament)

Other species that list Green Terror

Reverse lookup: these profiles reference Green Terror under safe or “best with” lists.