Cornish Jack (Mormyrops anguilloides)

Fish in the family Mormyridae. Hard care. Freshwater.

Quick facts

Scientific nameMormyrops anguilloides

FamilyMormyridae

Also known asBottlenose Mormyrid, Dolphinfish

Care levelHard

Reef safetyFreshwater

TemperamentAggressive

DietCarnivore

Adult size36 in

Minimum tank size250 gallons

Water parametersTemp 75-82°F, pH 6.0-7.5, GH 3-14 dGH

Appearance

Large elongated grey mormyrid with a blunt rounded snout, deep caudal peduncle, and a long low dorsal fin; pike-like predatory build.

Difficulty and care for the Cornish Jack

Hard

Origin and habitat

Africa (widespread)

Keeper notes

A monster weakly-electric mormyrid reaching 3ft, an active predator that swallows fish and is aggressive toward other electric fish; keep with large robust tankmates only. Sold small but grows huge. Strong jumper.

Log Cornish Jack in your reef tank

Reef Trak gives you the full record on every species in your tank: acquisition date, source, photos, parameters at time of stocking, and links to maintenance and feeding events. Track Cornish Jack alongside everything else in your reef.

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