Note
The production of living light- bioluminescence, is a widespread but very unevenly
distributed phenomenon among living organisms. As presently known, some five
terrestrial and 14 marine phyla and more than 700 genera are known to have luminous
species (Herring, 1987; Herring & Widder, 2001). The morphological diversity of
luminous organs, physiology and taxonomic occurrence of bioluminescence in fishes is
higher than in any other group of organisms and confined exclusively to marine habitats.