Jack Dempsey — Fish Profile
Rocio octofasciata
Quick Specs
| Adult Size: | 10.0" |
| Temperament: | aggressive |
| Care Level: | intermediate |
| Min Tank Size: | 55 gallons |
| Temperature: | 72-82°F |
| pH Range: | 6.5-8.0 |
| Diet: | carnivore |
| Origin: | Central America (Honduras to Mexico) |
| Lifespan: | 8-10 years |
Overview
Jack Dempseys are robust Central American cichlids named after the famous boxer for their feisty personality. They display beautiful iridescent blue-green spotting on a dark body, which intensifies during breeding. They dig extensively and will rearrange tank decor. Best kept in large tanks with other similarly sized, aggressive cichlids.
Care Guide for Jack Dempsey
Tank Setup
Jack Dempsey requires a minimum tank size of 55 gallons. Maintain water temperature between 72°F and 82°F, with a pH range of 6.5 to 8.0. A properly sized tank with adequate filtration and regular water changes is essential for long-term health. When housing Jack Dempsey with other species, always choose a tank size that accommodates the most demanding fish in the community.
Feeding
Jack Dempsey is a carnivore feeder. Provide a varied diet appropriate for carnivore species to ensure optimal health and coloration. Feed small portions 2–3 times daily, and remove uneaten food after a few minutes to maintain water quality.
Temperament & Compatibility
This species is classified as aggressive. Jack Dempsey reaches an adult size of 10.0 inches and has a care level of intermediate. Always research compatibility before adding new fish to an established aquarium. Individual temperament can vary, so monitor new introductions closely for the first 48 hours.
Origin & Lifespan
Jack Dempsey originates from Central America (Honduras to Mexico) and has an expected lifespan of 8-10 years when kept in proper water conditions with appropriate tank mates and diet.
Compatible Tank Mates
🟢 Good Tank Mates
🟡 Caution Tank Mates
🔴 Risky Tank Mates
Compatibility Results for Jack Dempsey
All 69 compatibility checks involving Jack Dempsey:
Recommended for Jack Dempsey
Hikari Cichlid Gold — $10.99Floating pellet for medium to large cichlids
Expert Care Tips for Jack Dempsey
- Large tank required: At 55+ gallons, Jack Dempsey needs serious equipment investment. Ensure your filter is rated for at least 1.5× the tank volume.
- Warm-water species: Jack Dempsey prefers 72–82°F. Use a reliable submersible heater with a thermostat — avoid temperature swings above 2°F per day.
- Adaptable pH range: Jack Dempsey accepts pH 6.5–8.0. Most tap water falls within this range, but always test and acclimate slowly.
- Aggressive species: Jack Dempsey will claim territory. Provide visual barriers (rocks, driftwood) and avoid housing with smaller or slow-swimming fish.
- Acclimation: Always drip-acclimate Jack Dempsey over 30–45 minutes. Match temperature and pH gradually to prevent osmotic shock.