Description
The Electric Blue Jack Dempsey – B grade (Rocio octofasciata) is a vibrant morph of the classic Jack Dempsey, a popular American Cichlid originating from the slow-moving freshwater rivers and lakes of Central America. The “B grade” label typically refers to individuals with less intense colouration or minor aesthetic variations compared to A-grade specimens, though they still retain the species’ striking electric blue hues. Known for their semi-aggressive behaviour and territorial instincts, these cichlids are suited to intermediate to advanced aquarists.
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Features of an Electric Blue Jack Dempsey – B grade
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Metallic blue iridescent scales across body and fins
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Reaches up to 20 cm in length when fully mature
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Flattened, oval body shape with strong jawline
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Males may exhibit more intense colouring and extended finnage
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Territorial, especially during breeding
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Lifespan of 8–10 years under proper care
The Best Aquarium Size for Electric Blue Jack Dempsey – B grade
A single Electric Blue Jack Dempsey requires a minimum of 200 litres. A tank of 300–400 litres is preferable for pairs or if housing with other cichlids. A larger footprint helps reduce aggression and provides ample swimming space.
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Tank Mate Compatibility for Electric Blue Jack Dempsey – B grade
Suitable tank mates must be similarly sized and robust. Compatible species include:
Avoid small, delicate, or slow-moving species, as they may be bullied or eaten.
Diet for Electric Blue Jack Dempsey – B grade
These omnivorous cichlids benefit from a protein-rich and varied diet:
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High-quality cichlid pellets or sticks
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Frozen or live foods: bloodworms, brine shrimp, krill
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Occasional treats of chopped earthworms or prawns
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Supplement with spirulina or vegetable flakes
Feed once or twice daily, offering only what they can consume in 2–3 minutes.
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Aquarium Setup for Electric Blue Jack Dempsey – B grade
Aquarium Filtration
Use a high-capacity canister filter or strong hang-on-back system. Electric Blues produce significant waste, requiring efficient biological and mechanical filtration.
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Aquarium Plants
Opt for hardy species like Anubias, Java Fern, or artificial plants. Cichlids may uproot soft-stemmed varieties.
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Aquarium Lighting
Moderate lighting enhances their iridescent colour without stressing the fish. Avoid overly bright setups.
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Aquarium Heating
Maintain water temperature between 25–28°C using a submersible heater with thermostat control.
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Aquarium Substrate
Use smooth gravel or sand, allowing natural digging behaviour without causing injury.
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Aquarium Decorations
Incorporate rock caves, driftwood, and ceramic structures to provide cover, territory zones, and visual barriers to manage aggression.
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