American Cichlid – Jack Dempsey – 4cm

Jack Dempsey Cichlid: A Bold and Beautiful ChoiceThe Jack Dempsey Cichlid (Rocio octofasciata), particularly the EBJD Split Gene variety, is a stunning and unique freshwater fish. Known for its intense colours and assertive personality, this cichlid makes an eye-catching addition to aquariums for experienced aquarists. Its vibrant appearance and engaging behaviour bring life and character to larger tanks.Size and LifespanJack Dempsey Cichlids grow up to 15–20 cm in length, with males typically larger and more colourful than females. With proper care, they can live for 10–15 years, providing long-term companionship and enjoyment.Tank Size and RequirementsA tank of at least 200 liters is required for a single Jack Dempsey, but larger tanks of 300 liters or more are recommended for pairs or multiple fish. They thrive in water temperatures between 24°C–28°C and a pH range of 6.5–7.5. Decorate the tank with rocks, driftwood, and sturdy plants to create hiding spots and territories. A sandy or fine gravel substrate is ideal, as these cichlids enjoy digging.Tank MatesJack Dempsey Cichlids are semi-aggressive and territorial, especially during breeding. They are best kept with similarly sized, robust fish such as Green Terrors, Oscars, or Convict Cichlids. Avoid housing them with smaller or very timid species, as these may become targets of aggression. Providing ample space and hiding spots helps reduce conflicts.Feeding Jack Dempsey CichlidsThese omnivorous cichlids thrive on a varied diet. High-quality cichlid pellets or flakes should be the primary food source. Supplement their diet with live or frozen treats such as brine shrimp, bloodworms, and earthworms to enhance their colour and health. Occasionally offering plant-based foods like spirulina flakes or blanched vegetables ensures a balanced diet.Understanding EBJD GeneticsThe Electric Blue Jack Dempsey (EBJD) is a stunning variation of the traditional Jack Dempsey, prized for its brilliant electric blue coloration. This colour morph results from a recessive genetic trait, meaning both parents must carry the EBJD gene to produce electric blue offspring.To breed EBJDs:Pair an Electric Blue Jack Dempsey with a standard Jack Dempsey that carries the EBJD gene (split gene).The offspring will include 50% split-gene carriers and 50% standard Jack Dempseys.To increase the likelihood of producing EBJDs, breed two split-gene carriers, though this requires careful planning and patience.Breeding EBJDs requires understanding their genetics and creating a stress-free environment with pristine water quality and proper nutrition. While rewarding, it can take several generations to achieve consistent electric blue offspring.Breeding Jack Dempsey CichlidsBreeding these cichlids can be rewarding but requires careful planning. They are substrate spawners and prefer flat rocks or other surfaces for egg-laying. Both parents actively guard the eggs and fry, displaying strong parental instincts. To encourage breeding, maintain clean water, a stable environment, and high-quality nutrition. Feed fry finely crushed flakes or baby brine shrimp for optimal growth.Specialised Care RequirementsJack Dempsey Cichlids, particularly the EBJD Split Gene variety, require a spacious, well-filtered aquarium with stable water parameters. Their semi-aggressive temperament and territorial nature mean tank layout plays a critical role — provide rock formations, driftwood, and caves for visual barriers and territories. Avoid delicate plants, as they tend to uproot or damage them.Care Notes:Maintain consistent water conditions with weekly water changes (25–35%).Use a secure lid; they may jump when startled.Ideal for experienced aquarists due to their aggression and breeding behaviours.Feeding GuideAs omnivores, Jack Dempseys thrive on variety. Feed high-quality sinking pellets as their staple diet, supplemented with frozen or live protein sources like bloodworms, krill, and earthworms. Occasionally offer plant-based foods such as spirulina flakes or blanched peas to maintain digestive health.Recommended Feeding Schedule:Juveniles: 2–3 small meals daily.Adults: 1–2 feedings per day with varied food types.Avoid overfeeding to reduce aggression and maintain water quality.FAQsHow big do Jack Dempsey Cichlids get? They grow up to 20 cm, making them ideal for medium to large aquariums.Are they aggressive? They can be semi-aggressive and territorial, especially when breeding.What tank mates are suitable? Robust fish like Green Terrors, Oscars, and Convict Cichlids are good companions.What do they eat? They eat high-quality cichlid pellets, live or frozen foods like bloodworms, and occasional vegetables like spinach or zucchini.How do they breed? They are substrate spawners and actively guard their eggs and fry.Are Jack Dempsey cichlids aggressive? Yes, they can be quite aggressive, especially as adults and during breeding.How big do Jack Dempseys get? They grow to 20-25cm, requiring very large tanks as adults.Can Jack Dempseys live with other sh? Only with other large, robust sh. They’re often best kept alone or in species tanks.What do Jack Dempsey cichlids eat? They’re omnivorous, eating high-quality pellets, live foods, and vegetables. Is the EBJD a different species? No, it’s a colour variant of the same species with a recessive gene causing electric blue colouring in offspring.Can I breed EBJD split genes? Yes. Breeding two split-gene carriers increases the chance of producing Electric Blue Jack Dempseys.Do they require live food? Not necessarily. A mix of pellets, frozen foods, and the occasional live treat is sufficient.Can I keep them in a community tank? Only with other robust, similarly sized fish. Avoid small or timid tank mates.What size tank is ideal? Minimum 200L for a single fish. Pairs or groups need 300L to minimise territorial conflict.Species OverviewSpecies: Rocio octofasciataCommon Name: Jack Dempsey Cichlid (EBJD Split Gene)Origin: Central AmericaDiet: OmnivorePH Range: 6.5–7.5Temperature: 24°C–28°CMax Size: Up to 20 cmTank Size: Minimum 200 litersAdd a Jack Dempsey to Your CollectionFor aquarists seeking personality and striking colour, the EBJD Split Gene Jack Dempsey delivers on both. With the right environment, this bold species becomes the centrepiece of any cichlid setup. Secure yours today and enjoy the brilliance of one of the most unique Central American cichlids.