"Of course not," he replied; "I shall never wish to."
"But you will wish to," cried his mother. "You won't be able to help it. It runs in the family. Listen, son. Once I was like you; I could swim and move about to find my food. Before me, all our grandfathers and grandmothers for millions of years back were for a part of their lives like you. If they had never stood on their heads they might have grown eyes and backbones and fins, and become as great and clever as the fishes. But because those old grandparents became lazy and stood on their heads till they grew to the rocks, we in turn have all grown lazy, and we in turn have been punished by the loss of our swimming powers. If you could only break loose from the family's bad habit, you might start a glorious free race of sea-squirts. All the most successful creatures in the sea are those that have backbones and eyes. You have the beginnings of these two things in you, but if you stand on your head you will lose them, as I have done. You will become fixed and helpless like the seaweeds. Promise me never to stand on your head. Promise me that you will keep moving."
"Yes, mother. Oh, yes. Good-bye. Good-bye." The impatient little fellow could wait no longer.
"How grown-ups talk!" he thought. "As if I should ever wish to stand on my head!"
He swam about for several hours, enjoying himself exceedingly in this great wet world. At last he came to the end pile of the jetty. Here, to his great astonishment, there suddenly came upon him the most overpowering desire to stand on his head. To stand on his head! The very thing his mother had foretold. Well, she was right, after all, so perhaps she was right in advising him to keep moving. "I will swim on," he said.
He swam on bravely. But before him was the wide open sea, with no comfortable piles to rest against. And oh! how he longed to rest. Just to put that heavy head of his down against something firm—how delightful that would be! That was a splendid pile, that last one! So strong and wide. It could not matter if he rested just a few minutes. He really would not stay long.
So, forgetting his promise, this foolish baby swam back. Down went his head against the comfortable pile, and alas! there he has stayed ever since. His mother's wise words faded from his mind. He was too lazy to stir. From his head tiny tubes grew on to the wood, holding him there for life.
What a change has come over him! Tail and little growing eye and backbone, all have died away; in their place has grown the long tube with the gaily-coloured fleshy ball at its end, through which the water runs with every wave, bringing sometimes food, sometimes nothing but sand and stones. Gone are the old swimming powers, the old free life. Gone is all chance of growing into something strong and grand and successful. He is beautiful, but he is helpless.
I wonder does he ever think of what might have been? Does he ever say, sadly: "If I had but kept moving on!"