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A deepwater fish with 'lightsabers' - dorsal spine-associated luminescence in a counterilluminating lanternshark

In English

Författare

  • Julien M. Claes
  • Mason N. Dean
  • Dan-E Nilsson
  • Nathan S. Hart
  • Jerome Mallefet

Summary, in English

We report the discovery of light organs (photophores) adjacent to the dorsal defensive spines of a small deep-sea lanternshark (Etmopterus spinax). Using a visual modeling based on in vivo luminescence recordings we show that this unusual light display would be detectable by the shark's potential predators from several meters away. We also demonstrate that the luminescence from the spine-associated photophores (SAPs) can be seen through the mineralized spines, which are partially translucent. These results suggest that the SAPs function, either by mimicking the spines' shape or by shining through them, as a unique visual deterrent for predators. This conspicuous dorsal warning display is a surprising complement to the ventral luminous camouflage (counterillumination) of the shark.

Publiceringsår

2013

Språk

Engelska

Publikation/Tidskrift/Serie

Scientific Reports

Volym

3

Dokumenttyp

Artikel i tidskrift

Förlag

Nature Publishing Group

Ämne

  • Zoology

Status

Published

Forskningsgrupp

  • Lund Vision Group

ISBN/ISSN/Övrigt

  • ISSN: 2045-2322