wunder beta

🐠 Animals of the Ocean

Dive into the big blue ocean to meet friendly fish, playful dolphins, gentle turtles, and a wiggly octopus!

lessons

~20 min

to learn

🔬 Science

subject

Ages 6–12

level

Start the course →

What you’ll learn

Fish and FriendsLearn that the ocean is home to many animals and that fish breathe underwater with gills.The ocean is a huge blue home full of animals. Fish swim with their fins and breathe underwater using special parts called gills. Little animals like the clownfish live near the coral, and the funny seahorse swims standing up.
Big Sea AnimalsLearn about dolphins, whales, and sea turtles, and that dolphins and whales come up to breathe air.Some ocean animals are very big and friendly. Dolphins and whales are not fish, so they swim up to breathe air. The blue whale is the biggest animal in the world. Sea turtles swim slowly and lay their eggs in the sand on the beach.
Clever Sea AnimalsLearn fun facts about clever sea animals, like the octopus with eight arms and the crab that walks sideways.The ocean is full of clever animals. An octopus has eight arms and can hide in tiny spaces. A crab walks sideways on its little legs and carries a hard shell to stay safe. Every ocean animal has something special about it.

Questions this course answers

What do fish use to breathe underwater?

Fish breathe with special parts called gills, so they can stay underwater all the time.

Where does a clownfish like to live?

Clownfish make their home near the pretty coral in the ocean.

Why do dolphins swim up to the top of the water?

Dolphins are not fish, so they come up to the top to breathe air before diving back down.

Where do mother sea turtles lay their eggs?

Mother sea turtles come to the beach and lay their eggs in the warm sand.

How many arms does an octopus have?

An octopus has eight arms, which it uses to swim, hold things, and hide.

How does a crab walk?

A crab walks sideways on its little legs, not forward like we do.

Grounded in trusted sources

National Geographic Kids
NOAA
Britannica Kids

Every Wunder lesson is built from real, reputable sources — never invented.

Related Science courses

🐬Whales and Dolphins Are Mammals 🏖️Coasts and Beaches 🐻‍❄️Arctic vs Antarctic ⚛️Atoms, Elements, and Compounds ⚖️Balanced and Unbalanced Forces 🐝Bees, Ants, and Their Colonies 🐠Biodiversity and Ecosystem Health 🦦Biodiversity and Keystone Species

Wunder is a personalized learn-anything platform — tell it any topic and it builds a beautiful, fact-checked course in minutes, with narration, a knowledge check, and a college-style University track.

Browse more Science courses · All topics · Home