For some time the old dog otter gravely surveyed his mate and his new cub, approvingly. Then he scanned sea and sky and kelp, listening the while with a pair of the sharpest ears that ever guarded the life of one of the wild folk, at the same time winnowing the air through a pair of nostrils that could smell smoke—that danger-signal to all wild people—a mile away. There was no sign of danger anywhere, and a moment later he disappeared under the water, after the food which his vibrant body unceasingly required.

For long after his disappearance the mother otter anxiously studied the horizon for the tiniest danger-signal. Convinced at last that all was well, she stretched herself out on the slow-swinging kelp, for one of those periods of quiet happiness which come even into the lives of the hunted. While her cub snuggled against her soft fur, she tossed a kelp-bulb high into the air, catching it like a ball, first in one bare little palm, then in the other, while she sang the cradle-song which all little sea otters know. High and shrill she chirped and twittered like a bird, in the midst of that lonely sea, clasping her sleepy baby closer as she sang.

There seemed no living thing near, yet death is never far from the sea otter. From mid-sky what seemed a dark wisp of cloud drifted toward the sea. Driven down by hunger from the North, an eagle owl, all buff and gray and brown, was crossing from Asia to America; for, unlike most of his fierce clan, he hunted by day. Larger than that death-in-the-dark, the great-horned owl, or that fierce white ghost of the North, the snowy owl, he skimmed down toward the kelp-bed, his round, fixed eyes gleaming red and horrible in the sunlight. Muffled by the softest of down, his great wings, although they had a spread of nearly five feet, were absolutely noiseless.

Not until the shadow of the bird, like the shadow of death itself, fell upon her cub, did the otter have the slightest warning of any danger. By that time it would have been too late for any other creature to escape. No animal, however, on land or sea can dive with the sea otter. Just as the crooked talons were closing, she slipped through the kelp into the water, without a splash, like something fluid, her cub clasped close, while overhead the baffled owl snapped its beak like a pistol shot, and flew on toward the Alaskan coast.

Down through the swaying tangles she twisted her way like an eel, until she passed clear through the floating bed of this strange growth of the sea, which grows with its roots in the air. There the water darkened, and as she neared the bottom a shape flashed ahead of her, lighted with that phosphorescence which all dwellers in the northern seas seem to acquire. The otter recognized the glowing figure as that of a sea bass, a bronze-green fish hardly to be distinguished from the small-mouthed black bass of fresh water. The bass was no mean swimmer, but the long, oar-like, webbed hind legs of the sea otter twisted over and over each other like the screw of a propeller, and drove her through the water with such tremendous speed that, in spite of the handicap of the cub, she soon swam down the fish, following its every twist and turn, and in less than a minute had caught it in her blunt teeth. Then, with the plump fish in her jaws, she swam up again through the kelp, and fed full, never for a moment, however, loosening her grip of her cub—for the babies of the sea folk who wander only a few feet from their mothers may never return.

The meal finished, the great otter climbed out on a pinnacle of rock just showing above the kelp. Immediately from a miracle of lithe, swift grace, she changed into one of the slowest and most awkward of animals. The webbed flipper-like hind feet, which drove her with such speed through the water, were of very little use on land, and her tiny forepaws were so short that they seemed to have no wrists at all. Slowly and painfully she waddled up on the rock, and there preened and cleaned and combed and licked every inch of her fur just as a cat would do, until it shone in the sunlight like a black opal.

As the weeks went by, the cub was trained in the lessons of the sea. He learned to enjoy salads of kelp-sprouts, and to dive with his mother to the bottom of the shallows, and watch her grind her way through the great clams of the northwest, whose bivalves are a foot in width, or crunch with her pebble-like teeth into the white meat of the vast, armored crabs of those seas. Another one of her favorite foods was the sea urchin—that chestnut burr of the sea. Protected by a bristling hedge of steel-sharp spines, it would seem safe from any attack. Yet, just as the squirrel on land opens without injury the real chestnut burr, so the sea otter had learned the combination which unlocked this little spiked safe of the sea, and devoured with much relish every one she could find.

As the weeks went by, the larder of the kelp-bed began to empty. The clam-beds had been stripped, the sea urchins were gone, and the fish had learned to keep away. Little by little, the mother otter hunted farther and farther from the safety of the kelp; until there came a day when, driven by hunger, she followed a fleeing pollock out into the open sea. The big gleaming fish, with the black line along its silver sides, swam far and fast. Yet, if the otter had not been hampered by her clinging cub, the chase would have been a short one. As it was, she did not overtake the fugitive until it was fully a quarter of a mile away from the kelp. In desperation it swam down into the lower depth, until the dull green of the water changed to black; but always the weasel of the sea was hard on its track, following the phosphorescent trail which the fleeing fish left behind.

Suddenly, as the pollock dived to even lower depths, in the hope that the water-pressure might drive back its pursuer, a grotesquely horrible head thrust itself up from the darkness right in its path. Dark, and shining like wet rubber, the shape resembled nothing so much as that of a great, double-headed sledgehammer. From either of the living hammer-heads gleamed a greenish, malignant eye. Before the pollock could dart aside, the great hammer-head shark turned partly over, there was a flash of sharp teeth, and the fugitive fish disappeared.

A second later the ridged, gray, fifteen-foot body shot toward the otter, with such speed that the water fairly hissed from the scimetar-shaped side-fins. The sea otter is among the swiftest swimmers of the mammals, but no air-breathing creature can compete in speed with a shark. Almost instantly the hammerhead was upon her. The jaws of all the sharks are so undershot that, in order to grip their prey, they must perforce turn over on their sides. This peculiarity of their kind was all that saved the otter. For a second the grim head overshadowed her. Then, with a twist of its long tail, shaped like the fluke of an anchor, the shark turned over and the vast mouth swung open, armed with six rows of inch-long, steel-sharp, triangular teeth, whose edges were serrated like a saw. Each separate tooth was curved back toward the gullet, so that for any living thing caught in their dreadful grip there was no more chance of escape than there would be from the interlocking cogwheels of a stone-crusher.