Set Facts
- The set includes BrickHeadz No. 176 and BrickHeadz No. 177.
- Koi Fish was designed by LEGO designer Leonard Bahro.
Regional Retail Prices (LEGO.com/Store)
Koi Fish Reviews
Brick Fanatics
“40545 Koi Fish features 203 pieces making one Koi fish and a Fry, as well as a base to display the two of them on transparent stands made to look as if the two figures are underwater. Floating foliage completes the scene and you can find this build on shelves from August 1,... More 2022.”
Bricksfanz
“This isn’t the first fish to be given the BrickHeadz treatment, that honour goes to the Goldfish. But it does offer the biggest departure from the BrickHeadz format. Due to the nature of the fish, you’re basically just building what would be the head section compared to... More other BrickHeadz. Obviously, it has a lot more detail to it such as the tail and fins, but both fish certainly require a lot less building compare to other sets.”
Full review at bricksfanz.com
Excerpts from third-party reviews
Subtheme Analysis
Lifespan
19 mos (this set 5 mos)
Annual growth
+6.50% (this set +11.93%)
This set's annual growth (CAGR) vs. subtheme
Community Stats
Koi Fish currently ranks #10 out of the top most owned sets in BrickHeadz Pets.
About BrickHeadz Pets

The LEGO One Piece BrickHeadz line launched in 2025 with two sets: 40799 Monkey D. Luffy and 40800 Buggy the Clown. These buildable figures depict characters from the Netflix live-action series, with additional BrickHeadz releases expected in the future.
Pets consists of 12 sets that ran from 2021 to 2022.
Summary
BrickHeadz Pets Koi Fish set 40545 was released in August 2022, retailing for $15, but has since been retired. New, unopened Koi Fish sets are valued at $40, while used sets can be found for $33.
Read more
Make a splash with LEGO® BrickHeadz™ fans by giving them the Koi Fish (40545) building set. The set comes with 2 fish – an adult and a fry – decorated with orange and black studs on a sturdy BrickHeadz baseplate. This buildable pet set makes a great gift for all kids, BrickHeadz collectors and anyone who loves cute animal models.
Buildable model for fish fans – The LEGO® BrickHeadz™ Koi Fish (40545) features 2 fish ‘swimming’ in a brick-built pond
Gift idea – Make a splash with a LEGO® BrickHeadz™ fan or animal-loving kid aged 8+ with this fun, buildable model
Colorful display – Model stands over 3 in. (8 cm) high, 4 in. (12 cm) wide and 2 in. (7 cm) deep and makes a colorful addition to any desk
Description provided by LEGO©