Flashlight Fish (Anomalops katoptron)

Fish in the family Anomalopidae. Expert care. Reef Safe.

Quick facts

Scientific nameAnomalops katoptron

FamilyAnomalopidae

Also known asSplitfin Flashlightfish, Lanternfish

Care levelExpert

Reef safetyReef Safe

TemperamentPeaceful

Dietcarnivore

Adult size5 in

Minimum tank size75 gallons

Water parametersTemperature: 72-78°F pH: 8.1-8.3 Salinity: 1.023-1.025

Feeding schedule1-2 times daily

Appearance

Anomalops katoptron is a small, dark-colored fish with a distinctive bioluminescent light organ below each eye. The body is elongated and compressed, with large eyes adapted to deep-water vision and a terminal mouth.

Diet and feeding

Flashlight fish are carnivorous planktivores in the wild, feeding on copepods and small crustaceans. In captivity, provide high-quality frozen foods including copepods, enriched brine shrimp, and small zooplankton preparations. Offer 1–2 times daily in small portions.

Difficulty and care for the Flashlight Fish

Expert - Nocturnal and difficult to feed. Best suited for expert aquarists only.

Common health issues

Marine ich, Fin rot, Swim bladder disorder, Bacterial infections, Parasitic infestations

Origin and habitat

Indo-Pacific, primarily found in deep reef environments from the Red Sea to the central Pacific, occurring at depths of 200–1000 meters.

Keeper notes

Nocturnal species with bioluminescent organs. Requires dim lighting and may be difficult to feed. Rare in the hobby.

Log Flashlight Fish 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 Flashlight Fish alongside everything else in your reef.

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