In the depths of the sea, a jellyfish hears a loud THOOMP. What is this mysterious sound? A wise fish explains that the THOOMP is a heartbeat. The jellyfish listens to the wise fish's soft heartbeat but sadly realizes she has no heartbeat herself, so she swims off to search for it. Along the way, she meets various creatures and learns about their heartbeats, from the seal to the whale to the octopus with three hearts! But why can't she hear her own?

Packed with fascinating scientific knowledge, including extra pages about the unique hearts of more amazing creatures, this engaging book shows the incredible diversity of life on Earth and encourages everyone to love how they are different and to celebrate being themselves. Hardcover. Suggested ages 3-5.