Danny Meadow Mouse is one of the most curious little people in all the Green Meadows. So when he found himself unexpectedly at the seashore, he began at once to explore. First he met Jimmy Skunk, who offered to guide him and who told him about the Crabs that went sidewise and the Clams that gave Danny unexpected shower baths. But Jimmy himself did not know as much about Clams as he should. In fact, the only one who really knew all about the unfamiliar creatures that Danny, Jimmy and Reddy Fox met on the shore was Graywing the Gull. The things that Graywing told about dozens of little water and shore creatures made Jimmy's eyes almost pop out of his head. Reddy did not believe half the strange things Graywing said until he found from his own watching that they were true.

They watched Starfish force Oysters to open their shells; they saw the Sand Eels bury themselves, and the Stickleback build his nest in the tide pool. They were stung with Jellyfish rays and lost a Squid when he turned the water in his pool black. In fact, they learned countless new and interesting things about Mother Nature's seaside children.

This is the fourth volume in the series which the Bird Book, the Animal Book and the Flower Book have already made popular. Like the others, it is beautifully made and illustrated and all the information is scientifically correct.

There are 28 pages of illustrations in color and 16 in black-and-white by W. Hamersley Southwick of the American Museum of Natural History. There are also 4 pages of illustrations in color by George Miksch Sutton, State Ornithologist of Pennsylvania.

From the dust jacket

It is to meet what seems to me a real need that this volume has been prepared. It makes no pretense of being more than it really is, - an introduction to the life of the seashore. Like its predecessors in this series it is intended to be at once a storybook and a handbook within its limitations.

In its preparations those things most frequently seen along the Atlantic coast have been selected. A few of the rare species have been added. The book does not pretend to cover in any degree of fullness the life of the seashore. It covers those things most likely to catch the eye and the interests of the child and does this in a way to make identification easily possible. It is hoped that it will arouse sufficient interest to lead the reader to desire to know more and to seek that knowledge in more scientific and complete works.

From the Preface