Rosie and Dyna were the best of friends until they worked on a school project together. Can Rainbow Fish help clear up the misunderstanding and mend their friendship?

Rainbow Fish swims over, under, around, and through the letters of the alphabet. Everyone's favorite fish invites youngsters along with him on a glittering undersea lesson in the alphabet. Rainbow Fish swims along the ocean floor, over, under, around, and through bright, bold letters, offering children a colorful and entertaining introduction to the basic building blocks of learning.

When Rainbow Fish gets lost and separated from his family and friends during an undersea storm, he makes new friends that help him find his way home.

When Miss Octavia Cuttle's class puts on Rainbow Fish's play, Pearl decides that she wants be different from her sister Rosie for a change.

When his last glittering scale falls off and sinks down into the deep sea, Rainbow Fish find the courage to follow it into the great unknown; discovering a new world with wonderful sights and friendly creatures of all shapes, sizes, and colors eager to make his acquaintance.