English: Ventral view of a hatchetfish, Argyropelecus olfersii, emitting bioluminescent blue light from the photophores that line its belly and mandible. In life, this light is used to camouflage the fish, reducing its silhouette against downwelling sunlight and thereby hiding the animal from upwards-looking predators. This photo was taken aboard the Irish ship RV Celtic Explorer inside a freezer using an iPhone - in person, the light was somewhat dimmer and paler than it appears here, but was still clearly visible with the naked, dark adjusted eye.
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Captions
Ventral view of the hatchetfish Argyropelecus olfersii showing blue bioluminescence from photophores
Items portrayed in this file
depicts
Argyropelecus olfersii
photophore
bioluminescence
creator
some value
object of statement has role: photographer
author name string: HulloThere
Wikimedia username: HulloThere
copyright status
copyrighted
copyright license
Creative Commons Attribution 4.0 International
captured with
iPhone 11 Pro
exposure time
1.1 second
f-number
1.8
focal length
4.25 millimetre
ISO speed
8,000
media type
image/jpeg
instance of
photograph
source of file
original creation by uploader
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