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10366 LEGO® ICONS Tropical Aquarium 3: Customisation

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Colorful display of the 10366 Tropical Aquarium with LEGO elements including a yellow submarine, a treasure chest, and various sea plants and coral.

We have been taking a look at the 10366 Tropical Aquarium, coming out in mid November 2025. This is a large, expensive set, quite unlike anything that the LEGO Group has produced at this scale before. It’s not based on a renowned piece of Architecture, it doesn’t tie in with any preconceived cinematic universes, and neither does it follow up with one of the regular ICONs subthemes. It’s a 52 litre fish tank, filled with corals, plants, and fish of unrealistic provenance. However, I must admit, it looks quite neat. Impressive even.

A colorful LEGO diorama of a tropical aquarium filled with various coral, plants, and fish, showcasing a vibrant underwater scene.

Fish tanks often feature decorative elements within them. The Tropical Aquarium features a treasure chest, tucked away in the back corner, serving as a bubbler, along with a rock cave and shelf. However, beyond that, it is comprised of all plants, coral, and anemones.

In fact, it’s beginning to look like one of those colourful underwater layouts you often see at LEGO Conventions, with lots of hidey holes and scope for exploration and storytelling. This left me thinking about the broad range of underwater exploration themes that have cropped up over the years, and more importantly, made their way into my collection. And how they could add life to this set.

Let’s start with a quick look at some of the sets which I own (and some that I don’t), which feel as though they might serve as aquarium decorations .

  1. A Brief History of Underwater Themes
    1. Aquazone
    2. 1997-2012: Divers, Alpha Team, Aqua Raiders and Atlantis
    3. LEGO City Deep Sea/ Polar Explorers
    4. LEGO IDEAS
    5. SpongeBob SquarePants
    6. The Little Mermaid
  2. Let’s consider the space that we are planning to customise.
  3. Filling the Aquarium
    1. SpongeBob Square Pants
    2. Yellow Submarine
    3. Fantasy Underwater Layout: Enter the Aquazone
      1. Action Stations
  4. In conclusion
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What did I learn from 10366 LEGO ICONS Tropical Aquarium?

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Display of the 10366 LEGO Icons Tropical Aquarium set featuring colorful marine life and coral structures, set against a bright blue background inside a glass enclosure.

The 10366 Tropical Aquarium will be released in mid November. In our previous article, we looked at the overall build experience. The set is the most expensive LEGO® Set that is not based on an external IP, such as a movie, or large piece of architecture. The final model is also quite large. I suspect this will be a model that has its ardent fans, but a lot of people will, quite rightly, be put off simply by the $AUD699.99/USD379.99/ €449.99 / £399.99 price tag.

Despite the pricing, this set is not without its merits. Today, I want to show you some of my favorite learnings from the set, which can be translated into models of your own. If you think they are interesting things, download the manual, or look up the relevant parts of construction in the LEGO BUILDER App. In my next installment, I’ll look at some other ideas for customising the model, while I intend examine the value in fourth of my review series. I am grateful that the LEGO Group sent a copy of this set over for review: all opinions and thoughts in here are my own.

A colorful LEGO® model of a tropical aquarium, showcasing various coral structures in vibrant colors, including purple, orange, and green elements, arranged on a rocky base against a textured blue background.

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10366 Tropical Aquarium: Build Experience

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A LEGO® set featuring a tropical aquarium with colorful fish, coral, and aquatic plants, presented in a clear tank design.

The Tropical aquarium is a premium LEGO® set, which at first glance seeks to tie the neat parts usage that characterises the Botanicals range, with the less official ‘Life Size Objects’ sub-theme that we have seen in recent years across LEGO ICONS and IDEAS. This represents a landmark in LEGO Set marketing: to date, it is the most expensive set released that does not tie in with any preexisting external intellectual property. I also recognise that if you are considering whether or not you are going to spend $AUD699.99/USD379.99/ €449.99 / £399.99, you probably want to be pretty sure that this is a set for you. The set represents a significant multifactorial investment – in monetary terms, display space and the time taken to assemble. I am grateful that the LEGO Group sent a copy of this set over for review: all my opinions are my own, as much as can be possible.

A colorful LEGO® model of a tropical aquarium, showcasing various coral structures in vibrant colors, including purple, orange, and green elements, arranged on a rocky base against a textured blue background.

In this first part of a multi-post review, I will look at the set itself, including the building experience.

In our next installment, I’ll show you some of the things that I learned from building the set. In part three, we will consider some ways you mightchoose to customise the display. In our final part, we will examine whether or not there is actual value for money in the set.

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10366 LEGO® Icons Tropical Aquarium Revealed

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LEGO® Icons set 10366 Tropical Aquarium displayed in a bright room, featuring colorful coral and fish built from LEGO pieces.

The latest LEGO® Icons set has been revealed, a 4154 piece model of a tropical aquarium.

If you have been observing the range adult-focused LEGO models released over the past few years, you will have noticed a number of recurring , popular subjects for realisation in LEGO models. One is the Botanical collection, debuting as a subset of ICONS in 2021, life size flower models have taken the world by storm, and (re) introduced LEGO Bricks to people who may not have picked one up for years. In parallel with this, life size real-world objects have become a trend that transcends third party IP: starting with the LEGO Ideas Typewriter, taking in a Globe of the World, Harry Potter artefacts, Disney Villain VHS cassettes, video game consoles and sports shoes.

And today we see a set revealed that combines the two: a collection of corals and anenomes that rival the Botanical collection in their crazy, colourful parts usage in the outline of a fishtank that looks to be the right size to fill up a dentist’s office.

LEGO Icons Tropical Aquarium set 10366 packaging featuring a detailed model of an aquarium with various colorful corals, plants, and fish.
LEGO Icons Tropical Aquarium set box featuring vibrant coral, aquatic plants, and colorful fish.

Set 10366 has 4154 pieces and will be priced at $AUD699.99 / $USD479.99 / €449.99 / £399.99. It goes on sale on the 13th of November 2025. Let’s see what we know from the press release:

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