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LEGO exclusive

LEGO Tropical Aquarium (10366)

Icons · 4,154 pieces

From £389.99 at Smyths Toys · 3% off

Not retiring yet (on sale since 2025)

LEGO Tropical Aquarium (10366)
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Compare prices (UK)

Regular price £399.99

See it at Smyths Toys, £389.99

Fair price: It’s a LEGO exclusive: other stores rarely have it, and LEGO seldom discounts its own sets.

LEGO exclusive: sold by LEGO; other listings, if any, are resellers.

. Amazon offers can be third-party (marked).

Similar sets with bigger discounts

Price history

Lowest price today
£389.99
at Smyths Toys
Lowest we’ve recorded
£384.99
Smyths Toys, 10 Oct 2026
LEGO’s regular price
£399.99
today’s lowest is 3% off
Tracked since
8 Oct 2026
10 price changes since
Price records (13)
  • 23 October 2026 · Kidinn£522.49
  • 21 October 2026 · Kidinn£523.49
  • 21 October 2026 · LEGO.com UK£399.99
  • 20 October 2026 · Kidinn£523.00
  • 20 October 2026 · LEGO.com UK£399.99
  • 19 October 2026 · Kidinn£525.49
  • 17 October 2026 · Kidinn£525.99
  • 16 October 2026 · Smyths Toys£389.99
  • 16 October 2026 · Kidinn£527.99
  • 15 October 2026 · Kidinn£526.99
  • 13 October 2026 · Kidinn£527.49
  • 10 October 2026 · Smyths Toys£384.99
  • 8 October 2026 · LEGO.com UK£399.99

Prices at LEGO.com UK, Amazon.co.uk, Argos, Smyths Toys, Very, John Lewis, The Entertainer and Kidinn, checked daily. A line breaks when a store was out of stock or not selling the set.

LEGO Tropical Aquarium in other countries

The lowest price today in each country where LEGO sells it, converted at the European Central Bank’s rate. Delivery across borders isn’t included: most stores only ship inside their own country.

CountryLowest priceIn GBP
Show all 13 countries

Exchange rates of 22 October 2026.

Resale value

What the LEGO Tropical Aquarium actually sold for on BrickLink, the LEGO-owned marketplace, in the last 6 months.

New

£319.03

Median of 1 sale (worldwide)

-20% vs LEGO’s regular price (£399.99)

Used

No sales in the last 6 months.

Sales on BrickLink, updated daily (last update 23 October 2026). Sold in US dollars, shown in British Pound at the ECB rate of 22 October 2026. Few sales mean a less reliable figure.

Set details

Pieces
4,154
Minifigures
None
Ages
18+
Released
2025
Set number
10366
Theme
Icons
Price per piece
9.4pat today’s lowest price
Size (H × W × D)
36 × 52 × 28 cm14.2 × 20.5 × 11.0 in
LEGO.com rating
3.9
LEGO Insiders points
3,200

LEGO Tropical Aquarium building instructions

Official instructions from LEGO.com, free to download. The LEGO Builder app has them too, many with 3D steps. All instructions on LEGO.com

LEGO Tropical Aquarium parts list

4,154 pieces in 693 different parts and colors.

  • Tile Special 2 x 2 with 2 Quarter Round Cutouts, Medium Azure×893396
  • Tile 2 x 6, Black×8369729
  • Tile 3 x 3 Curved, Macaroni, Medium Azure×7479393
  • Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip], Light Nougat×653484
  • Plate Round 1 x 1 with Open Stud, Dark Green×6585861
  • Tile 2 x 4 with Groove, Dark Tan×6287079

Parts list: Rebrickable.

About the LEGO Tropical Aquarium

Dive into an immersive project with the LEGO® Icons Tropical Aquarium (10366) fish tank decor building set for adults. Craft a detailed LEGO interpretation of a vibrant underwater world, teeming with life and striking colors. Arrange each feature for the perfect look and display your creation in the home or workplace for all to enjoy.

This home decor aquarium comes with fun functions. Rotate the dials and cranks to animate a swimming fish, swaying coral, a crab emerging from an underwater cave and an opening treasure chest. The aquarium includes 4 model fish and comes with a variety of plants and coral, sea worms and an oyster shell containing a pearl, plus LEGO sea snails and air bubbles.

Discover a space for relaxation with the inspiring range of LEGO creative building sets for adults. The LEGO Builder app features a digital version of the building instructions included with this DIY craft kit. Set includes 4,154 pieces.

  • Fish tank decor building kit – Take quality time out or treat a loved one with this LEGO® Icons Tropical Aquarium set for adults
  • What’s in the box – Includes everything you need to build a LEGO® fish tank with 4 fish and a variety of coral, water plants and creatures
  • Features and functions – Rotate the dials and cranks to animate a swimming fish, swaying coral, a crab emerging from an underwater cave and an opening treasure chest
  • Captivating home decor – Arrange each feature for the perfect look and display your creation in the home or workplace for all to enjoy
  • A fun holiday or birthday gift – Treat yourself or gift a loved one with this LEGO® Icons Tropical Aquarium building project for adults and pet fish lovers
  • Includes digital building instructions – The LEGO® Builder app features a 3D digital version of the building instructions included with this LEGO fish tank aquarium construction set
  • LEGO® building sets for adults – Discover a space for relaxation with the inspiring range of LEGO building projects (sold separately) designed specifically for adults
  • Dimensions – The fish tank in this 4,154-piece LEGO® aquarium building set measures over 14 in. (36 cm) high, 20.5 in. (52 cm) wide and 11 in. (28 cm) deep

Description: LEGO.com.

LEGO Tropical Aquarium: FAQ

Is the LEGO Tropical Aquarium retiring?

Not yet: the LEGO Tropical Aquarium isn’t flagged as retiring. LEGO.com UK doesn’t list it as “Retiring soon”. It has been on sale since 2025. We check every day and will update this page the day that changes.

How much is the LEGO Tropical Aquarium?

The lowest price we found today is £389.99 at Smyths Toys, out of 3 stores selling it today (regular price £399.99). Prices change often: this page is updated every day.

Should I buy the LEGO Tropical Aquarium now or wait?

3% off at Smyths Toys: a fair price. The best price today is £389.99 at Smyths Toys, 3% below LEGO’s regular price. It’s a LEGO exclusive: other stores rarely have it, and LEGO seldom discounts its own sets.

Where can I find the instructions for the LEGO Tropical Aquarium?

LEGO publishes them for free on LEGO.com as a PDF, linked on this page, and in the LEGO Builder app.

How many pieces are in the LEGO Tropical Aquarium (10366)?

4,154 pieces. At today’s price, that’s 9.4p per piece.

How big is the LEGO Tropical Aquarium?

Built, it measures 36 cm high, 52 cm wide and 28 cm deep (14.2 × 20.5 × 11.0 inches).

When was the LEGO Tropical Aquarium released?

It was released in 2025.

What is the LEGO Tropical Aquarium worth?

New, it sold for £319.03 on BrickLink (median of 1 sale in the last 6 months, worldwide). LEGO’s regular price is £399.99.

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