All artificial fires pale before the varieties of its organic brilliance.
The living branches of polyps, the eyes of the animals, even the mud sown with brilliant points, emit phosphoric shafts like sparks whose splendors incessantly vanish and reappear.

And these lights pass through many gradations of colors:--violet, purple, orange, blue, and especially green.

On perceiving a victim nearby, the gigantic cuttle-fishes become illuminated like livid suns, moving their arms with death-dealing strokes.
All the abyssal beings have their organs of sight enormously developed in order to catch even the weakest rays of light.

Many have enormous, protruding eyes.

Others have them detached from the body at the end of two cylindrical tentacles like telescopes.
Those that are blind and do not throw out any radiance are compensated for this inferiority by the development of the tactile organs.