I’m thrilled to feature a new nonfiction Perfect Picture Book today that introduces readers to little-known but vital creatures. Enjoy!
Title: The Ocean’s Heart: The Tiny Creatures Essential to Life
Written By: Jilanne Hoffmann
Illustrated By: Khoa Le
Publisher/Date: Millbrook Press/2026
Suitable for Ages: 4-8
Themes/Topics: ocean, sea creatures, zooplankton, plankton, phytoplankton, food chain, nonfiction, migration
Opening:
Far below the ocean’s surface live tiny, restless creatures called zooplankton. They are the ocean’s heart.
Brief Synopsis: A deep dive into the life cycle of zooplankton, the heart of the ocean.
Links to Resources:
· Check out the fascinating back matter;
· Learn more about the twilight zone of the oceans;
· Download an interactive resource guide and other resources from the author’s website.
Why I Like this Book:
Sometimes the smallest actors in our world can have the biggest impact. Such is the case for tiny zooplankton, the heroes of The Ocean’s Heart. Many readers, like me, probably know little about these minuscule creatures nor, perhaps, have they thought much about them. But as Hoffmann makes clear, our lives, and the lives of the rest of the world, depend on them. For “most ocean creatures, from the smallest fish to the largest whales” eat them.
Hoffmann invites readers to journey along with these ocean drifters who inhabit the deep and dark twilight zone in oceans worldwide. But as night descends, these creatures swim towards the surface where they gorge on even smaller creatures, phytoplankton. “It is the largest migration of animals on Earth,” and it happens every night.
Imagine it, millions of these tiny creatures “rise, paddle, and rise” to gorge themselves in darkness, and, as the sun starts to rise, they “dive, paddle, and dive” to return to the depths below. Who knew that the oceans teem with such activity each night and that our lives depend on it. Hoffmann presents such a compelling argument for the interconnectedness of life’s creatures and the importance of safeguarding our oceans and these tiny super creatures.
Given the size of these zooplankton, most “so small a thousand may live in one teaspoon of ocean brine,” and their hidden life in the ocean’s depths during daylight hours, this process is difficult to picture. Thankfully, Le has done an amazing job depicting them in all their minute and shimmery glory.
For home and classroom reading, I heartily recommend reading The Ocean’s Heart and discovering how even the tiniest ocean creatures make a difference in our world.
A Note about Craft:
To build empathy for these incredibly small creatures, Hoffmann encourages readers to “cheer them on their journey” to gorge each evening at the water’s surface. She invites readers to “take a moment here to savor their success” when zooplankton reach the surface. She also utilizes repetition to great effect – the “rise, paddle, and rise” and “dive, paddle, and dive” as well as other lyrical and image-rich language.
This Perfect Picture Book entry is being added to Susanna Hill’s Perfect Picture Book list. Check out the other great picture books featured there!
Wander, Ponder, Write 