The most beautiful fish in the entire ocean discovers the real value of personal beauty and friendship.

Rainbow Fish has a disagreement with Little Blue because Little Blue has a sea glass which Rainbow Fish thinks he lost.

"Rainbow fish and his friends should have known better than to leave the safety of their schoolyard in the Coral Reef. But Old Nemo's epic tales of the sea have sparked their curiosity..."

After Mrs. Seahorse lays her eggs on Mr. Seahorse's belly, he drifts through the water, greeting other fish fathers who are taking care of their eggs.

Sent out for a swim in the deep sea, Tiddler, a young fish who just can't keep still, sees many interesting creatures and one very dark cave.

Photographs and text explore the characteristics, habitats, and variety of fishes and other undersea life.