What age is the Koi Fish recommended for?

This set is recommended for ages 8+.

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🏛 Brickheadz

Set #40545

Koi Fish

Koi Fish is a vibrant splash of color in the BrickHeadz lineup, offering a delightful twist on the usual pop culture characters.

Before you buy

Who it's for: Ages 8+ · Beginner build Perfect for younger builders, BrickHeadz collectors, and fans of cute animal models
Build: 203 pieces · about 0.8 hours Build time is an estimate.
Price: $14.99 list price · 7.4¢ per piece
Availability: Retired at LEGO

★★★★☆ 4.0 community rating from 32 ratings

Fans appreciate the creative use of color and the refreshing departure from licensed characters, though some find the animal-themed BrickHeadz simpler builds compared to complex human figures.

$14.99

Check price on eBay

📝 Our Take

AI-assisted editorial summary, grounded in our LEGO database and public community discussions. How we use AI

Koi Fish is a vibrant splash of color in the BrickHeadz lineup, offering a delightful twist on the usual pop culture characters. This 203-piece set delivers a charming pair of aquatic pets—an adult koi and a smaller fry—crafted with clever orange and black stud detailing that captures the essence of these graceful pond swimmers.

This set is perfect for BrickHeadz completionists, animal lovers, and anyone looking for a quick, colorful desk display. The build comes together in under an hour, making it an accessible and relaxing project that breaks up the monotony of standard character-based BrickHeadz sets.

Skip this if you prefer the traditional licensed characters that define the BrickHeadz theme. If you aren't a fan of aquatic animals or brick-built pets, you might want to swim past this one and check out other seasonal or character-driven releases.

✨ New

Ask BlockTalk about this set

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BlockTalk

Hi! I'm BlockTalk, your LEGO expert. Ask me anything about the Koi Fish - building tips, investment potential, comparisons, or anything else!

Try asking:

How does the Koi Fish set differ from standard character-based BrickHeadz? What are the best ways to display the adult koi and fry together? Is this set a good starting point for MOC builders looking for orange and trans-light blue elements? How does the aftermarket value of non-licensed BrickHeadz compare to licensed themes?

🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI

🧩

203

Pieces

⏱

0.75h

Estimated Build Time

📊

Beginner

Difficulty

📏

12cm × 8cm × 7cm

Dimensions

Build Highlights:

Clever use of orange and black studs to mimic koi fish patterns
Features two distinct builds: a full-sized adult koi and a smaller fry
Sturdy BrickHeadz baseplate included for stable shelf display
Quick and satisfying construction suitable for a casual afternoon

📈 Investment Analysis

AI-assisted investment analysis, grounded in our LEGO database and public community discussions. How we use AI

Not enough price history for a trend

Investment Grade

⏳ Retired

As a retired BrickHeadz set featuring a unique non-licensed animal subject, the Koi Fish occupies a specialized niche in the secondary market. While licensed characters from Star Wars, Disney, or Marvel often command the highest aftermarket premiums, unique biological and seasonal BrickHeadz often develop a dedicated following among animal lovers and theme completionists. With a modest original MSRP of $14.99 and 203 pieces, the set's low entry price historically helps drive steady secondary demand once supplies dry up. However, because it lacks the broad pop-culture appeal of blockbuster franchises, appreciation tends to be slower and more steady rather than explosive. Potential investors should weigh the compact storage footprint against the slower liquidity typical of non-licensed niche sets. Market conditions fluctuate, and there are no guarantees that retired sets will appreciate significantly over time.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

⚖ Compare Similar Sets

Unlike most BrickHeadz that replicate movie or comic book characters, the Koi Fish (40545) leans into the Pets subtheme alongside sets like the Goldfish (40442) and Poodle (40543). It offers a more organic, fluid aesthetic compared to blocky humanoid figures, making it a favorite for nature enthusiasts who want something distinct on their shelves.

📦 Parts Inventory

Official piece count: 203
Parts cataloged in this inventory: 47 unique parts, 203 pieces

Missing a piece? Check this set piece by piece, with look-alike colors flagged and element IDs for replacements.

Plate 3 x 3

Part #: 11212 3× White

Animal Body Part,...

Part #: 13564 2× White

Plate Special 1 x...

Part #: 15573 1× Black

Plate Special 1 x...

Part #: 15573 4× White

Tile Special 1 x ...

Part #: 15712 4× White

Plate Special Rou...

Part #: 18674 2× Bright Green

Tile Special Roun...

Part #: 20482 4× Trans-Clear

Brick Special 1 x...

Part #: 22885 12× Light Bluish Gray

Tile Round 1 x 1 ...

Part #: 24246 7× Trans-Orange

Tile Round 1 x 1 ...

Part #: 24246 6× White

Tile Round 1 x 1 ...

Part #: 24246 5× Black

Tile Round 1 x 1 ...

Part #: 24246 7× Trans-Red

Tile 1 x 4 with G...

Part #: 2431 2× Medium Azure

Tile 1 x 4 with G...

Part #: 2431 4× Black

Plant, Flower, Pl...

Part #: 24866 2× Magenta

Part #: 27448 1× White

Brick 2 x 2

Part #: 3003 2× Green

Brick 2 x 2

Part #: 3003 1× Bright Pink

Brick 1 x 1

Part #: 3005 3× Bright Pink

Plate 2 x 4

Part #: 3020 2× White

Plate 2 x 3

Part #: 3021 1× Blue

Plate 2 x 3

Part #: 3021 2× White

Plate 2 x 2

Part #: 3022 2× Black

Plate 2 x 2

Part #: 3022 1× White

Plate 1 x 2

Part #: 3023 2× Trans-Red

Plate 1 x 2

Part #: 3023 2× Trans-Light Blue

Plate 1 x 1

Part #: 3024 4× White

Plate 1 x 1

Part #: 3024 4× Trans-Orange

Plate 1 x 1

Part #: 3024 8× Trans-Clear

Plate 4 x 4

Part #: 3031 4× White

Plate 4 x 4

Part #: 3031 2× Medium Azure

Plate 6 x 10

Part #: 3033 2× Medium Azure

Brick Sloped 45° ...

Part #: 3039 1× White

Brick Sloped 45° ...

Part #: 3039 1× Black

Brick Sloped 45° ...

Part #: 3040b 5× Trans-Clear

Brick Sloped 45° ...

Part #: 3040b 1× Tan

Brick Round 1 x 1...

Part #: 3062b 5× Trans-Light Blue

Brick 1 x 2 witho...

Part #: 3065 10× Trans-Light Blue

Tile 1 x 2 with G...

Part #: 3069b 4× Black

Tile 1 x 2 with G...

Part #: 3069b 1× Medium Azure

Brick Special 1 x...

Part #: 32952 4× Bright Light Orange

Plate Special 1 x...

Part #: 34103 3× Tan

Plate Special 1 x...

Part #: 34103 1× White

Equipment Dish / ...

Part #: 34172 1× White

Plate Special 1 x...

Part #: 35480 2× White

Plate 1 x 3

Part #: 3623 2× White

Crown / Flower / ...

Part #: 39262 2× Yellow

Antenna 1 x 4 wit...

Part #: 3957b 2× Trans-Light Blue

Plate 6 x 6

Part #: 3958 2× Black

Plate Round 2 x 2...

Part #: 4032a 1× Blue

Animal Body Part,...

Part #: 53451 2× White

Brick Sloped 30° ...

Part #: 54200 2× Dark Tan

Brick Sloped 30° ...

Part #: 54200 3× Trans-Red

Brick Sloped 30° ...

Part #: 54200 3× Trans-Orange

Brick Sloped 30° ...

Part #: 54200 7× Trans-Clear

Plate Round 1 x 1...

Part #: 6141 2× Dark Tan

Tile 1 x 3

Part #: 63864 1× Tan

Tile 1 x 3 with B...

Part #: 63864pr0044 2× White

Brick Sloped 30° ...

Part #: 85984 1× White

Plate 1 x 1 x 2/3...

Part #: 86996 3× Red

Tile 2 x 4 with G...

Part #: 87079 6× Medium Azure

Tile 2 x 4 with B...

Part #: 87079pr0289 2× White

Plate Special 2 x...

Part #: 87580 2× White

Tile Round 1 x 1 ...

Part #: 98138pr0060 4× Black

A fantastic parts pack for builders seeking trans-light blue elements, medium azure tiles, and various curved half-circle tiles in orange and black. It also includes useful SNOT (Studs Not On Top) bricks for compact building techniques.

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

Based on 6 videos

3.0 /5

Mixed

0% positive

BlockTalk AI

Reviews of LEGO Koi sets, particularly the FORMA Koi (81000), are largely neutral, focusing on unboxing and build processes. Reviewers like Jeremy Herbert and Adam's Brick Junction provide straightforward looks at the set, without strong positive or negative opinions expressed.

LEGO Koi Fish (31129) from Creator Majestic Tiger | Building Instructions | Top Brick Builder

Top Brick Builder • 12.5K views Review

Community Sentiment

Based on 6 YouTube reviews

Not enough Reddit data

YouTube

3.0 /5

Mixed

0% positive

Positive

Mixed

Critical

BlockTalk AI Analysis

What the Community Says

1 YouTube reviews

BlockTalk AI Summary

Jeremy Herbert showcases the LEGO FORMA Koi and Shark Skin, while Top Brick Builder provides building instructions for a Creator Koi Fish (31129) alternative. Adam's Brick Junction offers a review of the FORMA Koi set, contributing to the overall coverage of Koi-themed LEGO builds.