Fin's Fish Guide
The Flashlightfish (Anomalops katoptron) is a saltwater fish of the family Anomalopidae that grows up to 35 cm.
Description
The splitfin flashlightfish is a nocturnal reef fish of the Pacific, ranging from the Philippines and Indonesia to the Tuamotu Islands and Japan. It grows to about 35 cm and has a dark, almost black body. Its best-known feature is a large light organ beneath each eye, which glows thanks to symbiotic luminous bacteria; the fish can switch the light on and off by rotating the organ away. By day it shelters in caves along steep reef walls, and at night it emerges to eat zooplankton. The light helps in finding food, confusing predators and communication. The IUCN assesses the species as Least Concern (LC).
Frequently asked questions
How do you recognise the Flashlightfish?
The Flashlightfish has a torpedo-shaped body, is mainly black and shows a plain pattern. Light organ with luminous bacteria under each eye that can be switched on and off
Where does the Flashlightfish live?
The Flashlightfish lives in the sea (marine waters) and is mostly found around stony or rocky ground. Western and central Pacific
How big does the Flashlightfish get?
The Flashlightfish grows to a maximum of about 35 cm.
Is the Flashlightfish dangerous to humans?
No, the Flashlightfish is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.
Is the Flashlightfish edible?
The Flashlightfish is not usually eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
More from the family Anomalopidae
Want the complete picture on the Flashlightfish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Flashlightfish is one of 12,519 species in the app.