Bioluminescence
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<fishfyi-glossary slug="bioluminescence"></fishfyi-glossary>Definition
The production of light by living organisms through chemical reactions. Deep-sea fish use bioluminescence for attracting prey, communication, and camouflage via counterillumination.
Ausführliche Erklärung
Bioluminescence in fish is produced by the oxidation of luciferin by the enzyme luciferase, generating cold blue-green light with near-100% efficiency. Over 75% of deep-sea fish species produce bioluminescence. Anglerfish lure prey with bacterial bioluminescence in the esca (females only). Counterillumination — producing ventral bioluminescence to match downwelling surface light — is used by lanternfish and hatchetfish to eliminate their shadow and become invisible to predators below. Flashlight fish (Anomalopidae) have symbiotic bioluminescent bacterial organs that can be occluded with a shutter for communication and predator avoidance.