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

• Metallic blue iridescent scales across body and fins

• Reaches up to 20 cm in length when fully mature

• Flattened, oval body shape with strong jawline

• Males may exhibit more intense colouring and extended finnage

• Territorial, especially during breeding

• Lifespan of 810 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 300400 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:

• Green Terror

• Firemouth Cichlid

• Silver Dollar Fish

• Common Pleco

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:

• High-quality cichlid pellets or sticks

• Frozen or live foods: bloodworms, brine shrimp, krill

• Occasional treats of chopped earthworms or prawns

• Supplement with spirulina or vegetable flakes

Feed once or twice daily, offering only what they can consume in 23 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 2528C 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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