Through a big, round porthole with a thick frame and four screws, you can see seven smiling fish, a starfish, and a small jellyfish swimming by, a little sand mound down below. Our submarine window coloring page captures exactly this lively view outside, and you can print it for free right away.
Why This Design Feels Like a Real Window Into the Sea
With the thick frame and the four screws, this porthole feels almost like a real window you can look straight through into a colorful underwater world. The many round fish, the starfish, and the jellyfish offer plenty of room for a cheerful coloring experience.
With a thick frame and screws
Swimming past
Drifting gently by
By the little sand mound
🖨️ Step-by-Step: How to Print Perfectly
Click "Print Now" and set your printer to black & white to save ink!
Use thicker paper (100–120gsm) for markers so colors don't bleed through
A quiet spot with good light — a washable tablecloth is gold for little artists!
Think together about how ancient jellyfish might really be as an animal group!
🌊 Fun Facts About How Ancient Jellyfish Really Are
While your child colors, now is the perfect moment for a little story: the little jellyfish drifting elegantly past the porthole belongs to one of the very oldest animal groups on our entire planet. Fossil evidence shows that jellyfish were already swimming in the world's oceans more than 500 million years ago, long before the first dinosaurs ever walked the Earth, and even long before the first trees grew on land. That means jellyfish were already swimming through the oceans when the planet looked completely different from today. What's especially astonishing is that jellyfish have no brain, no heart, and no bones at all, yet they've survived successfully for half a billion years, while countless other animal species have long since disappeared during that time. Our little jellyfish at the submarine window is really a representative of one of the toughest and oldest animal groups in Earth's history. Anyone wanting to learn more about these fascinating creatures can explore the Wikipedia article on jellyfish together.
🎨 Creative Tip: What to Do With the Finished Picture?
Finished coloring the picture? Tell someone that jellyfish lived before the dinosaurs, and talk together about all the exciting things this little jellyfish might have seen in the ocean! ✂️
🎨 Which Colors Suit the Submarine Window?
For this lively design, colorful fish tones with clear accents work especially well. Here are our favorite color ideas for little artists:
For some of the fish
For more of the fish
For the jellyfish
For the porthole frame
💡 Coloring Technique Tip: Color each of the seven fish a different color — that makes the school look especially colorful and lively.
📅 When Is This Coloring Page Perfect For?
This design is a real all-rounder — here are our favorite occasions:
A colorful design for the party
Perfect for a topic about ancient animals
Fits any real outing
A cheerful coloring project
🌊 Fun Facts About Ancient Jellyfish for Kids
While your child colors, you can read these facts aloud — kids love natural history!
As an animal group
And even trees
Yet still successful
Right up to today
⚓ Discover More From the World of People & Vehicles Underwater!
The submarine window is part of our new collection all about explorers and vehicles underwater! Combine all the coloring pages in this series and create your very own underwater adventures:
🌊 Discover more from Ocean World:
🏫 Ideas for Preschool, School, and Home
This design works wonderfully as a starting point for small projects about real jellyfish, Earth's history, and sea creatures. In preschool, the picture pairs beautifully with a homemade porthole craft that kids can look through at drawn fish. In elementary school, this design makes a great introduction to a topic about very old animal species and the history of life on Earth, while at home it serves as an occasion to learn more about jellyfish and other ancient sea creatures together.
A homemade porthole craft with paper fish
An intro to Earth's history
Learning more about ancient sea creatures
🪼 What the Jellyfish Teaches Us About Endurance
The fact that such a simply built animal, with no brain and no heart, has survived successfully in the oceans for half a billion years shows kids, in a particularly striking way, that success doesn't always depend on being complicated. Just like the little jellyfish at the submarine window, it's worth knowing that even simple things can last a very long time when they fit well into their surroundings.
Your Benefits at PureSketchy:
- Thick Outlines: Clear lines, perfect for little hands.
- Free to Print: Over 500 designs available instantly, no sign-up required.
- Safe & Fast: Instant access to PDF-optimized WebP previews.
- Suitable for All Ages: A lively, kid-friendly design.
Frequently Asked Questions (FAQ)
What age is this coloring page suitable for?
The submarine window works for kids of all ages — the clear, rounded shapes suit every age group well.
Is the download free?
Yes, all coloring pages on PureSketchy are 100% free for personal use, preschools, and schools.
Which coloring tools work best?
For the fish, we recommend bold yellow and orange; for the jellyfish, soft violet.
Are jellyfish really that old?
Yes, fossils show that jellyfish were already living in the ocean more than 500 million years ago, long before the dinosaurs.
Is there a German/English version?
Yes! You can find the German version at Ausmalbild U-Boot-Fenster zeigt bunte Fischschwärme.