Dragon fish see using chlorophyll

  title={Dragon fish see using chlorophyll},
  author={R. Douglas and J. Partridge and K. Dulai and D. Hunt and C. Mullineaux and A. Tauber and P. Hynninen},
Most deep-sea fish have visual pigments that are most sensitive to wavelengths around 460-490 nm, the intensity maxima of both conventional blue bioluminescence and dim residual sunlight. The predatory deep-sea dragon fish Malacosteus niger, the closely related Aristostomias sp. and Pachystomias microdon can, in addition to blue bioluminescence, also emit far-red light from suborbital photophores, which is invisible to other deep-sea animals. Whereas Aristostomias sp. enhances its long… Expand
Long-wave sensitivity in deep-sea stomiid dragonfish with far-red bioluminescence: evidence for a dietary origin of the chlorophyll-derived retinal photosensitizer of Malacosteus niger.
Three genera of deep-sea loose-jawed dragonfish are sensitive in this part of the spectrum, to which all other animals of the deep sea are blind, potentially affording them a private waveband for illuminating prey and for interspecific communication that is immune from detection by predators and prey. Expand
Enhanced retinal longwave sensitivity using a chlorophyll-derived photosensitiser in Malacosteus niger, a deep-sea dragon fish with far red bioluminescence
To compensate for its apparently reduced longwave sensitivity compared to related species, the outer segments of M. niger contain additional pigments, which are identified as a mixture of defarnesylated and demetallated derivatives of bacteriochlorophylls c and d that are used as a photosensitiser to enhance its sensitivity to longwave radiation. Expand
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The aquatic environment offers a natural laboratory for the study of visual ecology, as many fish probably modify their visual pigment complement, either during development or seasonally, as they change factors such as their feeding habits, geographical location, depth of habitat and photic environment. Expand
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Localisation and origin of the bacteriochlorophyll-derived photosensitizer in the retina of the deep-sea dragon fish Malacosteus niger
Instead up-regulated Malacosteus genes were associated with photosensitivity and may relate to its unique visual ecology and the chlorophyll-based visual system, and it is suggested that the unusual longwave-reflecting, astaxanthin-based, tapetum of Malacosta may protect the retina from the potential cytotoxicity of such a system. Expand
Diversity and Ecological Correlates of Red Fluorescence in Marine Fishes
The largest data set of red fluorescence in fishes to date is collected and analyzed, consisting of confirmed cases in 272 primarily diurnal fish species from 49 out of 90 surveyed fish families and 12 out of 21 surveyed fish orders, contrasted to 393 fish species with confirmed absence ofred fluorescence. Expand
Using red light for in situ observations of deep-sea fishes
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Far-red sensitivity of dragon fish