Common name: Eyelight fish

General information

The Flashlight Fish, scientifically known as Photoblepharon palpebratum, is a captivating species renowned for its unique ability to produce bioluminescent light. This light is generated by symbiotic bacteria housed in special light organs located beneath the eyes. The fish can control the intensity and duration of the light by using a muscular eyelid to cover or reveal the light organ. This bioluminescence is used for communication, attracting prey, and evading predators.

Care

Caring for Flashlight Fish in captivity requires a specialized environment that mimics their natural nocturnal habitat. They thrive in dimly lit aquariums with plenty of hiding places. It's essential to maintain a consistent day-night cycle and provide a diet of live or frozen foods like brine shrimp and plankton to keep them healthy and active.

Reproduction

Reproduction of Flashlight Fish in the home aquarium is rare and not well-documented. In the wild, they are believed to scatter their eggs, which then hatch into planktonic larvae.

Symbiosis

The symbiotic relationship between Photoblepharon palpebratum and its bioluminescent bacteria is a remarkable example of mutualism. The bacteria benefit from a safe habitat and nutrients provided by the fish, while the fish uses the light produced by the bacteria for various survival functions.

Habitat

Flashlight Fish are typically found in tropical and subtropical waters, often around coral reefs and overhangs. They prefer depths where sunlight is minimal, allowing them to use their bioluminescent abilities to their full advantage.