The male sea lion, of eleven or twelve feet in length and a thousand pounds in weight, is yellowish-brown in color with shaded darker patches. There is a distinct mane upon the [207] neck, which, with its upright posture, combines to give the creature its supposed leonine appearance. The males are fierce in aspect, and if hard pressed will turn and show fight. Old animals bellow like bulls; the younger ones bleat like sheep. They bolt their fish without mastication. The female is only about half the dimensions of the male, and is considerably lighter in color. The animal is useful only for its hide, flesh, and fat.
THE WHALES (Cetacea)
Under the general name of Cetacea, i.e., the Whales, are classed together a wonderful group of marine Mammalia, which includes not only the true whales, but also the Dolphin, Narwhal, Porpoise, and Grampus.
Notwithstanding their marked resemblance to fishes, the Cetacea possess the most indubitable mammalian character.
In the cetacea the bodies are elongated, fish-like, devoid of hair, and run out into a powerful caudal fin. The fore limbs are in the form of fins; there are no hind limbs. The cetacea are marine animals, and their food consists wholly of water animals and plants.
The whale is an astonishing animal, and in order that it may subsist a number of apparently contradictory conditions must be reconciled. It is a warm-blooded mammal, and yet spends its life wholly in cold water. In order to dive to great depths it must be able to make its body heavier than a corresponding bulk of water, and conversely at will make it lighter in order to reach the surface. Though breathing atmospheric air through nostrils, the animal can exist at a greater depth than where the pressure of the water would force its particles into solid oak, and yet no water can reach the whales’ lungs. It must be able to exist without breathing at all for at least the space of an hour. With the bones, ears, and eyes of a mammal it has to move, hear, and see as though it were a fish.
The “spouting” or “blowing” of the whale is simply an operation of purifying its blood. When the animal comes to the surface, it first expels the air in its lungs as it takes its first deep breath.
Dolphin (Delphinus delphis).—The dolphin is grey or greenish black on its upper parts, and white beneath. It generally attains a length of six feet, and lives in herds in all the northern seas. Hundreds of these swift animals are often seen around vessels, and amuse the passengers by their playful gambols. They feed chiefly on fish.
Greenland Whale (Balæna mysticetus).—This whale is greyish black on its upper parts, and white beneath. It is from forty-eight to seventy-two feet long, and weighs upwards of twenty thousand pounds. It is the largest of all living animals; a boat with six persons could enter its jaws. Its tongue is nine feet broad, eighteen feet long, and weighs about eight hundred pounds.
The whale inhabits the northern parts of the Atlantic and Pacific. It has been hunted for the sake of its blubber since the ninth century. A whale forty-eight feet long, and fourteen thousand pounds in weight, will furnish six thousand pounds of blubber, from which four thousand eight hundred pounds of oil will be obtained; there will also be over three thousand pounds of whalebone, which lies in the upper jaw in the place of teeth.