Goldfish swimming past aquarium castle, leafy plants, bubbles, pebbles, and a treasure chest coloring page

Goldfish by the Castle and Treasure Chest

A wide-tailed goldfish glides between tall aquarium plants, a stone castle, rising bubbles, rounded pebbles, and a locked treasure chest.

Free to print for personal and classroom use. This coloring page is part of the Fish collection, made for ages 8–12 and drawn in a Standard style.

Colored example of this coloring page

🎨 How to color it

Color the goldfish in sunny orange and pale gold, the aquarium castle in soft gray stone, the leafy plants in two greens, and the treasure chest in warm brown with brass trim. Use sharp colored pencils for the fish’s tiny scales, castle bricks, and chest planks, then switch to broader strokes for the long fins and large leaves. Try a pale blue wash behind the bubbles so the orange fish feels bright against the cool tank water.

Finished color by number solution

🔢 How this color by number works

Find each number in the key and fill its zone: 504 zones and 15 colors, sized for adults. Tiny unnumbered slivers borrow the color of their neighbors, and the little model above shows the finished page whenever you want to check your work. More grids like this live in our color by number gallery.

Prefer classic line art? Open this drawing as a regular coloring page.

The story behind this coloring page

The Key That Hummed — Every evening, when the room lights turned honey-yellow, Elian carried a bent tin key from the pebble field to the little castle tower. Read the full story →

Every evening, when the room lights turned honey-yellow, Elian carried a bent tin key from the pebble field to the little castle tower. It was too small for any lock and too dull for treasure, but when he held it under his fin, it hummed with the same low buzz he remembered from his first night in the tank. He wanted to tuck it into the tower window before the filter made its round, because there the hum sounded almost like a voice.

Until one day, the filter coughed—grrrk, whump—and the current shoved backward. Because of that, the tallest plants bowed across the path, their leaves brushing Elian’s scales like wet ribbons. Because of that, the old treasure chest tipped open a finger’s width, and the key’s hum changed into three clear taps: tink, tink, tink.

Elian hovered, fins trembling. The tower was safe. The chest was dark. At last he slid the little key into the gap, not to unlock anything, but to listen. A stream of silver bubbles poured out, lifting the chest upright and nudging the plants away from the castle road. “Oh,” Elian whispered. By morning, the key rested in the tower window again, humming low in the honey-yellow light—and if you find the tiny bubbles near the chest, you may know what courage sounded like.

Keep coloring — next in the Fish collectionAll Fish pages →

More in Standard style, from other worldsAll Standard pages →

More for ages 8–12 (big kids)All pages for ages 8–12 →

More color by numberAll color by number →

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