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Everything You Need to Know About LEGO Icons 10366 Tropical Aquarium | November 2025

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The LEGO Icons theme is taking a deep dive next month with one of the most visually striking display-worthy models of the year - 10366 Tropical Aquarium. Following the success of recent licensed LEGO Icons sets such as 10365 Captain Jack Sparrow's Pirate Ship and the rumoured 10356 Star Trek: USS Enterprise D, the LEGO Group are turning its attention from the stars and seas to the underwater world in a non-licensed format.


The Important Details

10366 Tropical Aquarium is the latest 18+ release of 2025 and one of the biggest yet. In fact, once 10366 releases on the 13th of November 2025, it will be easily the largest and most expensive LEGO Icons set of the year, retailing for $499.99 / €499.99 / £449.99 with a total of 4,154 pieces included.


The vibrant and immersive brick-built aquarium will be unlike anything we've ever seen before and likely a prominent model in LEGO's diverse portfolio until it retires in December 2028. In the meantime, the 2025 set will likely remain exclusive to LEGO stores and LEGO shop@home, with an official presentation and reveal of 10366 expected within the next week or so.


Previous LEGO Aquariums

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This isn't the first time LEGO has experimented with aquatic displays. The last major fish tank-style build appeared in 2021 with 31122 Fish Tank from the LEGO Creator 3-in-1 theme. With just 352 pieces, the small aquarium included five colourful fish, a mini submarine, coral, and a few plants, primarily aimed at younger builders and designed as a playset.


In contrast, 10366 Tropical Aquarium is designed to be a premium, adult-targeted reinterpretation of the idea, literally replacing an actual fish tank with a brick-built, display-worthy version. Altogether, the set's over 4,000 pieces will create an incredible model measuring over 14 inches (36 cm) high and 20 inches (52 cm) wide.



The Main Build

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10366 Tropical Aquarium is a visually rich diorama that faithfully recreates an actual fish tank. The large rectangular aquarium is encased in a sleek black frame, very similar to 31122 Fish Tank but on a larger scale, resulting in a more sturdy build. And just like the LEGO Creator 3-in-1 model from four years ago, the 2025 18+ version includes no glass pannelling, with just the back wall being filled in.


That background wall features an intricate pattern of curved blue tiles that create the illusion of rippling water. A couple of transparent elements can also be found here, representing bubbles. The base of the aquarium mimics a sandy ocean floor, utilising tan and nougat tones with a combination of sloped elements to create this realistic sandy and rocky texture.


The centre of the build is taken up by a huge rock formation coloured grey and nougat, with a whole underwater ecosystem flowing from it. The different coral builds include a vivid magenta and lavender sea anemone, clusters of lime green and turquoise coral, bright red and orange branching coral sections, a purple sponge-like structure and a small yellow coral orb resembling a honeycomb sponge.


Amongst all the coral builds, flowing leaves and various plants, we can find a total of four tropical fish, each displayed and attached to the build in various ways. The four colour brick-built fish include a white-orange fish with yellow accents, a dark red fish with white and orange stripes, a purple fish with shades of yellow and a light blue-yellow fish with a mint coloured tail.


Final details of the 18+ model include a brick-built treasure chest located at the rear of the build. The entirely brown chest with hints of grey can be opened to reveal some golden LEGO treasure. The Tropical Aquarium also includes another sea creature of an orange crab, emerging from the centre rock/cave. Further details and unique builds can likely be found inside the crab's cave to complete an incredibly colourful and stunning set.


So that's everything you need to know about 10366 Tropical Aquarium, but what do you think? Will you be purchasing 10366 in a months time? What element of this entirely brick-built LEGO Aquarium are you looking forward to building the most? 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.



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