Pick a sea friend, color it, then press "Send to the sea" — it starts swimming instantly and stays as long as you keep the page open.
Our sea ·
🎨 Color a creature and press "Send to the sea"!
Pick & color
Brush size
How it works
Choose one of six sea creatures, then paint inside the outline with the brush — colors never spill outside the lines, so it is great for young kids. "Base color" fills the whole body underneath what you already painted, and the eraser turns areas back to white. When you press "Send to the sea", your creature dives into the ocean and starts moving the way its species does: fish and turtles swim and turn, jellyfish and octopuses pulse, crabs scuttle along the sand and shrimp dart backwards. Your own creatures never disappear while the page is open; the background is filled with recent drawings from other visitors around the world, which rotate over time. When you leave the page, your latest drawings are sent to the sea so other visitors can meet them too.
The six sea creatures, and what they really look like
Each of the six has a colouring worth knowing before you decide to ignore it. Reef fish are the brightest animals in the sea because clear shallow water carries colour well and the reef makes a busy background to stand out against. Jellyfish are mostly transparent, and many produce their own light, glowing blue-green in the dark. Octopuses change colour in under a second using pigment sacs in the skin, so no single colour is wrong for one.
Crabs are often dull brown or grey when alive and turn red only when cooked, because heat destroys every pigment except the red one. Shrimp do the same. Sea turtles have shells patterned in overlapping plates, and the pattern is worth following with your brush because it gives the shell its shape.
Colour choices for underwater scenes
Water swallows red first. If you want something to look deep down, leave the reds out and lean on blues and greens.
Give the jellyfish a pale, light colour. A dark jellyfish stops looking like it is made of water.
Stripes and spots read better than a single flat colour on a fish. Two colours in bands is enough.
Use the base colour fill for the body first, then add detail on top. It saves repainting the whole shape.
Or ignore all of this. A purple crab is a perfectly good crab, and the sea will accept it.
What happens when you send it to the sea
Your creature dives in and starts moving the way its species does. Fish and turtles swim in long steady lines, turning when they reach the edge. Jellyfish pulse and drift rather than swimming, rising and sinking with each contraction. Octopuses move in bursts. Crabs and shrimp keep to the sea floor, scuttling sideways along the bottom.
Everything you release stays in the water for as long as the page is open, so the sea fills up as you colour more. Nothing is uploaded and nothing is saved on a server — closing the tab empties the tank, so save any picture you want to keep before you go.
Yes. While you are on the page, your creatures swim only in your own sea. When you leave the page, your latest drawings are uploaded and appear as background swimmers in other visitors' oceans for a while. No name or personal information is attached — only the colored picture itself.
Why did a background creature disappear?
The background sea always keeps about twenty creatures, rotating through recent drawings from visitors around the world — old ones swim away with a trail of bubbles as new ones arrive. Your own creatures are different: they never disappear while the page stays open.
Is it safe for young kids?
It is designed for that. Painting only works inside the creature outlines — there is no free drawing, no text and no chat, so nothing inappropriate can be written or drawn. Shared pictures are just colored versions of the same six outlines, with no names attached.
Can I save my creature as an image?
Yes — press "Save picture" to export your colored creature as a PNG with a transparent background. On phones and tablets the share sheet opens so you can save it straight to your photos; on a computer it downloads as a file.
Why does my shrimp swim backwards?
Because real shrimp do exactly that: when startled, they snap their tail fan under their body and shoot backwards in quick bursts, an escape move known as the tail-flip. Each creature in the aquarium copies its species — jellyfish and octopuses pulse, crabs scuttle sideways along the sand, and fish and turtles cruise and turn.
Can a real octopus change its color?
Yes — octopuses are among the best color-changers in the ocean. Their skin is packed with tiny pigment sacs called chromatophores that expand or shrink in a fraction of a second, letting them blend into rocks and sand or flash signals. So give your octopus any pattern you like; a real one might wear it briefly too.