Others in moments of irritation or amorous fever, cover themselves with streaks of light and tremulous spots, different colored clouds passing over their epidermis with every thrill.

The cuttlefish and ink fish, upon perceiving that they are pursued, enwrap themselves in a cloud of invisibility, just as did the enchanters of old in the books of chivalry, darkening the water with the ink stored in their glands.
Ferragut continued to pass slowly along the Aquarium between the two rows of vertical tanks,--stone cases with thick glass that permitted full view of the interior.

The clear and shining walls that received the fire of the sun through their upper part, spread a green reflection over the shadows of the corridors.

As they made the rounds, the visitors took on a livid paleness, as though they were marching through a submarine defile.
The tranquil water within the tanks was scarcely visible.

Behind the thick glass there appeared to exist only a marvelous atmosphere, an air of dreamland in which drifted up and down various floating beings of many colors.