Jack Dempsey tank mates
Jack Dempsey tank mates are other large, tough New World cichlids or nothing. Community lists that include tetras are fiction. Oscars, green terrors, and common plecos in huge tanks are the honest conversation; anything peaceful and small is food or a stress toy. Build the hardscape for territory breaks and accept rearranging décor.
Common mistakeBuying two Jack Dempseys ‘for company’ in 200L is how keepers invent a permanently cornered fish. Even a matched pair needs divided territory and honest footprint. Do not park a juvenile in a neon community hoping adulthood will stay peaceful — mouth size and temper arrive together.
Each name below opens a pair check with Jack Dempsey. That check is the decision, not the list itself.
Usually safer companions
Conservative shortlist from this profile. Open a pair page before you buy.
The Jack Dempsey profile lists Green Terror as both safe and a recommended pairing. Green Terror is a aggressive intermediate-care species with a 300L minimum. Run the pair checker for your specific tank before stocking.
The Jack Dempsey 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
May work with more water, a mature system, or a species-only setup. Read the pair page before you experiment.
Angelfish is flagged predatory. Equal-size adults usually coexist, but the moment one is stressed, sick, or smaller after a moult, it becomes prey. Both species defend territory. The pairing needs a long footprint and rockwork or planting that breaks the sightline between two defended spots. Angelfish is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Jack Dempsey. Run the pair checker before stocking.
Both species defend territory. The pairing needs a long footprint and rockwork or planting that breaks the sightline between two defended spots. Run the pair checker before stocking.
Fish to avoid with Jack Dempsey
Predation, aggression, or space rules on this profile. Treat these as poor default mixes.
Jack Dempsey is flagged as predatory or as likely to eat small fish, and Corydoras Catfish at 6cm is well within an adult Jack Dempsey's gape.
Jack Dempsey is flagged as predatory or as likely to eat small fish, and Guppy at 5cm is well within an adult Jack Dempsey's gape.
Jack Dempsey is flagged as predatory or as likely to eat small fish, and Neon Tetra at 4cm is well within an adult Jack Dempsey's gape.
Jack Dempsey is flagged as predatory or as likely to eat small fish, and Tiger Barb at 7cm is well within an adult Jack Dempsey's gape.
Tank size and groups
- Published minimum for Jack Dempsey: 200L. 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: 200L hub.
Easier alternatives to consider
Hardier first-tank names from the library. Still read the profile. Not a substitute for reading this one.
Plan before you buy
Start a pair check with Jack Dempsey, or open a starter plan with the top safer companions in the builder.
Tank hubs: 200L
Related reading
Guides that list other fish with the same trait, so you can plan around the group rather than one row.
- Fish that eat smaller tank mates →
Jack Dempsey may eat anything that fits in its mouth as it grows.
Filtration & heating
A 200L minimum tank for Jack Dempsey needs a filter rated for at least 800L/hr turnover and a heater maintaining 22–28°C.
Similar fish (same category)
- African Cichlid · min 200L
- Convict cichlid · min 200L
- Discus · min 200L
- Firemouth Cichlid · min 200L
- Keyhole cichlid · min 200L
- Rainbow cichlid · min 200L
- Electric Blue Acara · min 150L
- Severum · min 250L
Related (care + temperament)
Other species that list Jack Dempsey
Reverse lookup: these profiles reference Jack Dempsey under safe or “best with” lists.
Featured compatibility checks
Curated pair pages for Jack Dempsey. Each opens a full verdict — not just a list label.
Jack Dempsey tank mates — quick answers
- What fish can live with Jack Dempsey?
- Usually safer companions on this hub include Green Terror, Oscar. Open each pair check before you buy — the list is a shortlist, not a guarantee.
- What tank mates should you avoid with Jack Dempsey?
- Avoid Corydoras Catfish, Guppy, Neon Tetra, Tiger Barb based on size, temperament, or predation risk on this profile.
- What size tank do Jack Dempsey need for a community?
- 300 L absolute minimum for one. 450 L or more for a bonded pair.