wunder betaOcean & Marine Life Classes for Kids
37 free ocean & marine life classes for kids (Ages 6–12) on Wunder — short, fact-checked courses and lessons with narration and a quiz. Filter by age — each link is its own page, not a JavaScript toggle.
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Why the Ocean Stays Layered
The ocean looks flat, but density builds layers beneath the surface. Learn why they persist, and what finally mixes them.
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Polar Food Chains
Follow the food chains of the Arctic and Antarctic, from tiny phytoplankton and krill all the way to whales and polar bears.
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Earth's Frozen Water
From glaciers to sea ice to snow, explore the cryosphere, all of Earth's frozen water, and discover why it matters for the whole planet.
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Comparing Polar Ecosystems
The Arctic and Antarctic look alike but are opposites, an ocean ringed by land and a continent ringed by ocean. Compare their worlds and wildlife.
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Whales and Dolphins Are Mammals
They live in the sea and look a bit like fish, but whales and dolphins are mammals like us. Find out how they breathe air and feed their babies milk.
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Tides, Waves, and Currents
Why does the sea rise and fall, where do waves come from, and how does water travel across whole oceans? Meet the three great motions of the sea.
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The Ocean's Depth Zones
Take a dive from the sunny surface down into total darkness, and discover the sunlight, twilight, and midnight zones and the creatures that live in each.
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The Ocean Floor
Beneath the waves lies a hidden landscape of flat plains, towering mountain ranges, and trenches deeper than any mountain is tall. Explore the bottom of the sea.
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The Ocean and Climate
Discover how the giant ocean soaks up heat, makes clouds and rain, and helps steer the whole planet's weather.
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Rock Pools
Peek into the little pools left behind when the sea goes out, and meet the starfish, crabs, and colourful creatures that live in them.
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Ocean Food Webs
One ocean animal usually eats many foods, and is eaten by many others. See how dozens of food chains link together into a tangled ocean food web.
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Ocean Food Chains
Follow the sun's energy from tiny sea plants all the way up to the hungry shark, and see how every ocean animal is a link in the chain.
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Ocean Ecosystems
Explore coral reefs, kelp forests, and the open sea to see how ocean living things depend on one another.
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Ocean Currents and Global Heat
Follow the global conveyor belt, a worldwide loop of currents that moves heat around the entire planet.
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Ocean Animals and Their Adaptations
From streamlined sharks to glowing anglerfish, discover the clever body features and tricks that help ocean animals swim, breathe, hide, and hunt in the sea.
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Ocean Animal Migrations
Follow whales, turtles, and salmon on some of the longest journeys any animal makes across the open sea.
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How We Protect the Ocean
Meet the marine reserves, clever rules, and everyday heroes helping the ocean stay wild and full of life.
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How We Explore the Ocean
Climb aboard submersibles, listen with sonar, and pilot robots to explore the deepest, darkest parts of our planet.
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How Humans Harm the Ocean
See how plastic and overfishing hurt the sea, and the hopeful steps people are taking to fix them.
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Deep-Sea Creatures
In the cold, crushing, pitch-black deep sea live some of the strangest animals on Earth. Meet glowing anglerfish, giant squid, and creatures that thrive with no sunlight at all.
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All About Oceans
The ocean is the biggest, bluest place on Earth. Dive in to learn why it is salty, where the waves come from, and who lives in the big blue.
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Animals of the Ocean
Dive into the big blue ocean to meet friendly fish, playful dolphins, gentle turtles, and a wiggly octopus!
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Words for Habitats
A habitat is the home where a plant or animal lives. Learn the words for forests, deserts, ponds, oceans, and icy lands.
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Salt Water and Fresh Water
Almost all of Earth's water is salty ocean. Only a tiny slice is the fresh water we drink. Explore both, and why fresh water is so precious.
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Land and Water on Earth
Earth is a big ball of land and water. Explore the oceans and continents, climb the mountains, and follow the rivers as you discover where all the land and water on our planet can be found.
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Animal Migration
Follow the incredible journeys animals make, terns flying pole to pole, monarchs crossing a continent, whales swimming between oceans, and learn why they travel so far.
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How Animals Communicate
Discover the amazing ways animals send messages, birdsong, whale calls, the honeybee's dance, wolf howls, and flashing fireflies, and why talking to each other keeps them alive.
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Animal Record-Holders
Meet the world's animal champions, the giant blue whale, the speedy cheetah, the tiny bee hummingbird, the towering giraffe, and compare their sizes to things you know.
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Creatures of the Deep!
Dive down into the deep, dark ocean and meet the glowing, wobbly, and wonderful creatures that live where sunlight never reaches.
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Animal Migration
Follow animals on epic journeys across oceans, skies, and grasslands.
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Coral Reefs
Discover the tiny animals that build the ocean's most colorful cities.
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Great Explorers
Sail with the daring explorers who mapped the world's oceans.
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The Water Cycle
How water moves from oceans to clouds to rain and back again.
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The Oceans
Dive into Earth's oceans, the vast blue waters that cover most of our planet.
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Whales & Dolphins
Meet the giants and geniuses of the sea: whales and dolphins.
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Sharks
Dive in and discover the amazing sharks that have ruled the oceans for ages!
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The Moon
Meet Earth's closest neighbor: its phases, its craters, and how it pulls the tides!
All Ocean & Marine Life courses (topic hub)
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