Ocean and underwater jigsaw puzzles
Ocean and underwater jigsaw puzzles are the brightest pictures on the site: coral reefs in every colour, clownfish in their anemones, sea turtles, seahorses, jellyfish and sunlit shallows. Reefs are busy, which is good news — almost every piece has something on it. The blue water around them is the part that tests you, fading from bright near the surface to deep below.
Collection Underwater 42 puzzles - Sunlit Reef New
Green Jellyfish New 
White Octopus New 
Seahorse in Blue New 
Sea Turtle New 
Purple Jellyfish New 
Blue Jellyfish New 
Bright Clownfish New 
Koi in the Pool New 
Spiky Seahorse New 
Leafy Sea Dragon New 
Sea Coral Reef New 
Diver Clown Fish New 
Hermit Crab The New 
Coral Reef Sea New 
Leaf Fish Animal New 
Sea Ocean Water New 
Coral Under The New 
Coral Reef Sea New 
Coral Reef Sea New
Start with the fish and the brightest coral, then the reef around them. Open water changes colour with depth, so sort the blue pieces from palest to darkest and place them in layers from the top of the picture down. Rays of light through the water make excellent guides across several pieces.
Under the sea
Underwater puzzles are bright and full of life: reef fish, turtles, jellyfish, corals and the light coming down through the water. The animals are easy to place; the blue is the hard part. Water gets darker with depth, so sort the blue pieces from light to dark and you have, in effect, a map of top to bottom. Coral reefs are busy and colourful and make better large puzzles than open water.
What’s in this collection
This page has 42 puzzles, and the subjects that come up most often in them are coral (14), reef (9), fish (7), sea (7), clownfish (5) and seahorse (4). The newest was added on 7 October 2026.
They include 42 photographs from Pixabay. Among them: Reef and Little Fish, Clownfish at Home, Seahorse on the Coral, Seahorse in Blue, Turtle over the Sand, Clownfish in the Anemone, Clownfish in Pink, Divers over the Reef, Koi in the Pool and The Great Aquarium.
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Common questions
Are there ocean jigsaw puzzles for kids?
Yes. Clownfish, turtles and coral reefs are colourful and easy to recognise, so they work well for children at 24 or 48 pieces.
How do I solve the blue water in an ocean puzzle?
Water gets darker with depth. Sort the blue pieces from light to dark and place them in bands from the surface down.
Are underwater puzzles good for children?
Yes. Fish, turtles and dolphins are favourites, and the bright colours help young solvers. Pick 24 or 48 pieces so the open water stays manageable.
Which ocean puzzles are hardest?
Pictures with lots of open water and only a small animal, or schools of identical fish. Coral reefs are easier at the same size because every patch is a different colour.