The subject area of each episode may focus on a particular sea environment (natural phenomena or living things), or concentrate on the main character’s interaction with the human world.
The protagonist, a little boy called
Ripples, is the one who is best able to act on the information he gathers. The pelican Icarus, who is something of a mentor figure for the group, often has the task of instigating a quest in the earlier stages of the episode. The octopus Polly and the hermit crab Jason provide the comic moments.