Although near-infrared vision (780–1,000 nm) has long been deemed impossible due to noise in visual pigments, sensation of near-infrared light was reported in the common carp and in three cichlid species. Fish use NIR to capture prey and for phototactic swimming orientation. NIR sensation in fish may be relevant under poor lighting conditions during twilight and in turbid surface waters.
although near-infrared vision (780–1000 nm) has long been deemed impossible due to noise in visual pigments sensation of near-infrared light was reported in the common carp and in three cichlid species fish use nir to capture prey and for phototactic swimming orientation nir sensation in fish may be relevant under poor lighting conditions during twilight and in turbid surface waters