What happens to the denizens of the tidal zone when the sea recedes every 12 hours? This is the question that Hodgkins answers in a playful yet instructive way. Children are introduced to crabs, sea urchins, mussels, sea worms, starfish, lobsters, periwinkles, and other creatures that must adapt to constantly changing conditions. In this enhanced edition, enjoy read-along and fun animations that further illustrate adaptations these sea animals make to survive each day.