LEGO Icons 10366 The Fish Tank Rumoured For November 2025

Only two more unrevealed sets remain in 2025 for the LEGO Icons theme: one of these is this year's intergalactic Black Friday model of 10356 Star Trek: USS Enterprise D, and the other will be the biggest and most expensive set of the year for the 18+ theme. In particular, this is 10366 The Fish Tank, which includes a total of 4,154 pieces retailing for $499.99 / €499.99 / £449.99 once it launches on the 13th of November 2025.

A fish tank has appeared in brick-built LEGO form before, with 2021's 31122 Fish Tank. The LEGO Creator 3-in-1 model, however, was significantly smaller with just 352 pieces included to recreate the glassless tank that featured five colourful fish, a mini submarine and plenty of coral and aquatic plants. This LEGO Icons version, releasing in November, will be significantly larger and more detailed, but it'll be interesting to see how LEGO make the 18+ model worth that $500 price tag.

We imagine the build itself will take on the stereotypical look of a fish tank of a large rectangular aquarium built with clear panels and reinforced corners to mimic the look of glass. The size of the tank will be a significant length with a detailed and sturdy frame, most likely in a simple black colour scheme. If LEGO do recreate the glass look of a fish tank, then we can expect plenty of large transparent panels to be utilised, likely explaining that less than favourable price per piece ratio.

Inside the aquarium, we can expect a colourful world of aquatic life. Plenty of brick-built fish will be included, of different sizes, patterns and colours, most likely suspended with clear rods to create the illusion of swimming. Coral reefs, seaweed, sand and underwater rock formations should also appear to basically recreate a section of the ocean in an entirely brick-built fish tank.

10366 The Fish Tank

Set Name - The Fish Tank

Set Number - 10366

Age Range - 18+

Piece Count - 4,154

Price - $499.99 / €499.99 / £449.99

Release Date - 13th November 2025

10366 The Fish Tank releases on the 13th of November 2025, but what do you think? Will you be purchasing 10366 in a couple of months time? What would you like to see included in this large and very expensive brick-built fish tank? What would you like to see from the LEGO Icons theme in 2026 and beyond? Let us know your thoughts and opinions in the comments below.