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Flashlight Fish (Anomalops katoptron)

Find Flashlight Fish across reef-livestock retailers and from fellow hobbyists on ReefDock. Compare sources, check live pricing where available, and review source-tank parameters on Reef-Trak-verified fish listings before you buy.

Flashlight Fish
Photo: Haplochromis · Public domain
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Where to buy Flashlight Fish

ReefDock searches the following reef retailers for this fish. Click through to see the live price.

  • Saltwaterfish

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  • Amazon

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  • Petco

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About Flashlight Fish

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.

Key facts

Diet Details
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.
Temperament
Peaceful
Origin
Indo-Pacific, primarily found in deep reef environments from the Red Sea to the central Pacific, occurring at depths of 200–1000 meters.
Family
Anomalopidae
Aka
Splitfin Flashlightfish, Lanternfish
Care Level
Expert
Common Health Issues
Marine ich, Fin rot, Swim bladder disorder, Bacterial infections, Parasitic infestations
Max Size
5
Water Parameters
Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.023-1.025
Min tank size
75 gallons
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.
Care Requirements
• Minimum 75-gallon tank with dim, low-light conditions • Nocturnal species; require darkness and gentle lighting • Stable water parameters: 72-78°F, pH 8.1-8.3, sg 1.020-1.025 • Rocky caves and hiding spots essential • Feed small live or frozen foods (copepods, amphipods)

Looking for a hobbyist seller?

ReefDock's marketplace lets reef-keepers sell fish directly to other reef-keepers with Stripe-secured checkout and live-arrival photo confirmation. Browse current fish listings on ReefDock, or list your own.

Verify the source tank before you buy

ReefDock is the sister app to Reef Trak. Sellers who maintain a Reef Trak tank log can publish source-tank parameters on eligible fish listings — so you can see the conditions a fish was raised in before you buy. Log this fish on Reef Trak.

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