Gene Zion

When a white dog with black spots runs away from home, he gets so dirty his family doesn't recognize him as a black dog with white spots. Harry is a white dog with black spots who loves everything . . . except baths. So one day before bath time, Harry runs away. He plays outside all day long, digging and sliding in everything from garden soil to pavement tar. By the time he returns home, Harry is so dirty he looks like a black dog with white spots....

When a wave washes over a dog and covers him with seaweed, he is mistaken for a sea monster.