LEGO SET 31122 - Alternate build | Fish Tank

Title: Diving Deep: Uncovering the Hidden Potential of LEGO Set 31122-1 Fish Tank

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Imagine peering through the glass of a vibrant aquarium, where every corner teems with life and color. Now, picture recreating that mesmerizing underwater world not with live creatures, but with the click-and-snap magic of LEGO bricks. LEGO Set 31122-1, the Creator 3-in-1 Fish Tank, offers more than its namesake build—it’s a treasure trove of parts that can be reimagined into entirely new marine scenes. Whether you’re an aspiring aquarist, a seasoned MOC designer, or simply a lover of oceanic whimsy, the Fish Tank set’s translucent panels, bright coral hues, and hinge elements invite limitless creativity.

Beneath the surface of this modular set lies a palette of blues, oranges, and greens ideal for crafting kaleidoscopic reefscapes. Builders can fashion everything from gently swaying kelp forests to bustling fish schools darting through stony grottoes. Even the more unconventional elements—such as the curved tank walls—become dynamic structural features in alternative models, serving as the domed shell of a submarine pig or the armored plating of a tiny mech suit. By embracing the set’s unique color scheme and specialized pieces, MOCers can push beyond the typical “fish in a tank” scenario, weaving narratives of underwater exploration, treasure hunting, and imaginative sea-dwelling civilizations.

In this article, we’ll dive into four standout alternate builds—each created exclusively with parts from Set 31122-1—to demonstrate how a single Creator 3-in-1 box can unlock a world of aquatic adventure. From delicate coral reefs to whimsical submarines, prepare to be inspired by the ingenuity of the LEGO community and to chart your own course beneath the bricks.

Alternative Builds from the PDF

Coral Reef 31122 Alternative Build

By gabizon
Get the instructions: https://rebrickable.com/mocs/MOC-115693/gabizon/coral-reef-31122-alternative-build/

Seahorse and Octopus – 31122 Alternate Model

By C3technic
Get the instructions: https://rebrickable.com/mocs/MOC-127794/C3technic/seahorse-and-octopus-31122-alternate-model/

Submarine Pig

By eric_nunya
Get the instructions: https://rebrickable.com/mocs/MOC-118952/eric_nunya/submarine-pig/

Submarine Mech Suit

By eric_nunya
Get the instructions: https://rebrickable.com/mocs/MOC-157656/eric_nunya/submarine-mech-suit/