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Jack Dempsey

Rocio octofasciata

Freshwater Central America Usually captive bred

Named after the ferocious boxer, this heavy-bodied cichlid glitters with bright turquoise and gold spangles over a dark body. Powerful and territorial, it will redecorate the tank and attack smaller fish. House with large, robust tankmates or as a lone specimen in a rocky, cave-filled setup.

Also called: Jack dempsey.

20 cm adult length, drawn to scale. deep body.

Try it in the planner Opens a tank sized to its minimum with 1 fish added.

What it needs

ItemValueBecause
Adult length 20 cm Used for the Space check: the tank must be long enough for the fish to turn round.
Smallest tank 250 L, at least 120 cm long estimated The least water and floor length this species is kept in for good, as a single fish or smallest group.
Extra water per added fish 60 L estimated What each further fish adds once the minimum is met.
Waste load Class 4 of 5 estimated How much waste an adult makes against its size. Feeds the Load check.
Temperature 22 to 28 C Stock sharing a tank need overlapping ranges.
pH 6.5 to 8 Compared with tankmates in the Water check.
Hardness GH 8 to 25, KH 4 to 15 Degrees of general and carbonate hardness.
Flow Low Low-flow fish are stressed in a strong current.
Light Dim Matched to the lighting class on the needs sheet.
Group size Single fish is fine Not a schooling species.
Temperament Aggressive Territorial: strong.
Swims in Near the bottom Fish that use different levels share a tank more easily.
Lifespan About 12 years A fish is a long commitment.
Experience Some experience helps A guide to how forgiving the species is of mistakes.

Tags marked estimated are judged from the size and habits of the species rather than measured, so treat them as a sensible default.

Diet and tank layout

Jack Dempsey is an carnivore that swims in the lowest part of the tank. It eats or uproots plants, so choose hard-leaved species or none. Give it plenty of cover. It digs, so anchor plants and keep hard rock off loose sand. It will eat fish small enough to swallow.

Tankmates

Works with

No close matches in the data. Check the pair tool.

Depends

Avoid

Compare any two fish on the compatibility page, or print the equipment for a stock on the needs sheet. How this is worked out: the method.