Pfister's winking do-gooder returns; Rainbow Fish and his pals find their krill-eating grounds mooched upon by a huge blue whale. The whale appears to mean no harm, and when the ""fish with the ragged fins"" calls him a ""wicked whale,"" his feelings are hurt. Accordingly, he menaces the school until Rainbow Fish enters into peace talks. Thereupon the scales are smoothed, the blowholes quieted, and the sea creatures return to a state of bliss: ""It was a wonderful life."" It's almost painfully formulaic, but some children will never get enough of Rainbow Fish, who has now been promoted to ambassador of peace of the pelagic domain.