Screenshots
Watch trailer on Steam ↗Behind Glass: Aquarium Simulator
BitBros Inc · Published by BitBros Inc
Very Positive — 95% positive (419 reviews) · 11 achievements
Last updated 27 Sept 2026
Create stunning virtual aquariums on your PC! Our advanced 3D engine brings your fish tank to life with breathtaking realism, featuring lifelike fish, plants, decorations, and more. Transform your monitor into a vibrant, living aquarium. Virtual aquascaping has never been easier!
£14.99
Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Indie, Simulation, Casual · 2025 · More £5 - £15 games
Dive into the serene world of Behind Glass: Aquarium Simulator and craft stunning fish tanks with an advanced 3D engine. Transform your monitor into a vibrant aquatic wonderland without leaving your chair.
About this game
Behind Glass is the ultimate fish-keeping game, designed to deliver a relaxing yet deeply engaging experience for aquarium enthusiasts and casual players alike.
Whether you’re a passionate aquascaper or simply enjoy the calming beauty of underwater worlds, this game offers everything you need to create your dream aquarium.
Explore a vast sandbox environment where you can design stunning 3D aquariums with incredible creative freedom. Choose between freshwater and saltwater tanks, each offering unique challenges and opportunities to showcase your style. With access to over 280 unique fish species, along with crabs, turtles, and axolotls, your tanks will be bursting with life.
Behind Glass stands apart with its immersive water chemistry simulation, allowing players to delve into the science behind aquarium care. Adjust pH, salinity, and other parameters to create the perfect conditions for your aquatic friends. For those who prefer a more relaxed approach, the designer mode offers the freedom to focus on design and aesthetics without any constraints.
Forget about grinding or locked content — everything is available right from the start. From vibrant fish to countless decorations, you’ll have every tool at your disposal to craft aquariums that reflect your imagination.
Dive deep into the game’s features:
Instant access to a vast array of decorations, plants, and creatures.
Detailed animations and realistic behaviors for fish and aquatic animals.
The ability to mix and match species in diverse habitats.
A meditative, stress-free atmosphere designed for relaxation.
No other fish tank simulation comes close to offering this level of depth and creativity. Whether you’re a beginner or an experienced aquascaper, Behind Glass lets you build, customize, and manage stunning aquariums without limits.
Start your aquascaping journey today and transform your virtual tanks into mesmerizing underwater worlds!
System Requirements
Will my PC run this? →Minimum
- OS: Windows 10
- Processor: Dual core
- Memory: 4 GB RAM
- Graphics: Nvidia GeForce GTX 970 / AMD RX480
- DirectX: Version 11
- Storage: 2 GB available space
Recommended
- OS: Windows 10
- Processor: Quad core
- Memory: 8 GB RAM
- Graphics: Nvidia GeForce GTX 970 / AMD RX480
- DirectX: Version 11
- Storage: 2 GB available space
Supported Languages
Latest news
AnnouncementsOfficial
New Fish Species & Decoration Pack DLC
Here's another update with new content and improvements! This time, we've added plenty of new inhabitants and a decorations DLC for your aquariums:10 New Fish Species: Black Neon Tetra, Butterfly Barb, Dwarf Pencilfish, Hourglass Basslet, Orange Clownfish, Polynesian Anemonefish, Raja Ampat Dottyback, Sunrise Dottyback, Tetra Toucan, and Tucanare Peacock Bass.New DLC: Decoration Pack – Unlock 57 decoration items across 15 groups, including rocks, driftwood, and a variety of novelty decorations such as castles and treasure chests. The DLC also includes 6 new example aquariums.Bug Fixes and ImprovementsThank you for playing Behind Glass — and as always, happy aquascaping and relaxing!Read full article on Community Announcements (BitBros Games)AnnouncementsOfficial
Meet 20 New Species
It’s been some time since the last content update — and now your aquariums are getting a major expansion!This update introduces 20 brand-new fish species, including standout additions such as the vibrant Blood-Red Jewel Cichlid, the striking Orangespine Unicornfish, the bold Sergeant Major, and the ever-popular Texas Cichlid.From colorful reef dwellers to fascinating freshwater personalities, this lineup brings even more variety to your tanks. As always, the update also includes smaller fixes and improvements behind the scenes to keep everything running smoothly.Thanks for playing — and enjoy discovering the new arrivals!Full list of new species in this update:Blacksaddle wrasse Blood-red jewel cichlid Bumblebee goby Cactus pleco Cuckoo catfish Double-saddle butterflyfish Dwarf botia Guinean angelfish Halstead's sandy Jaguar guapote Keyhole cichlid King angelfish Masked bannerfish Orangespine unicornfish Rainbow krib Sergeant major Sun catfish Texas cichlid Threadfin butterflyfish Whitecheek tangRead full article on Community Announcements (BitBros Games)AnnouncementsOfficial
Meet the New Species
This update introduces 11 new fish species, including highlights such as the Hawaiian Cleaner Wrasse, Spanish Hogfish, Midas Cichlid, and Three-Spined Stickleback.Alongside the new additions, the update includes various bug fixes and smaller improvements to keep everything running smoothly.Thanks for playing and enjoy the new arrivals!Full list of new species in this update:Tanaka's possum wrassePolynesian wrasseRainbow caleSpanish hogfishHawaiian cleaner wrasseBadisBlue tetraThree-spined sticklebackRed-tailed black sharkBanded leporinusMidas cichlidRead full article on Community Announcements (BitBros Games)AnnouncementsOfficial
20 New Fish Species + Recolor Your Gravel
It’s time for another update packed with fresh content and enhancements. Here’s what’s new in your aquariums:20 New Fish Species 🐟Black SurgeonfishChinese High-Fin Banded SharkCuckoo WrasseFlagtail ProchilodusGold Nugget PlecoHarlequin HindHarlequin TuskfishJapan SurgeonfishLeopard Coral GrouperLumpfishPale ChubPike CharacinPolleni CichlidRed Sea Sailfin TangSiamese TigerfishSixbar DistichodusSohal SurgeonfishSpotfin BettaStriped PanchaxYellowtail SurgeonfishGravel Customization 🪨We’ve added two new gravel types, and even better — you can now recolor all gravels to match your style and create even more vibrant aquascapes.And as always 🐛This update includes various bug fixes and small improvements to keep things running smoothly.Thanks for playing Behind Glass — and happy aquascaping!Read full article on Community Announcements (BitBros Games)AnnouncementsOfficial
New Fish, Jellyfish, Round Aquariums
We’ve just released another update with new content and improvements -- here’s what’s new in your tanks: 10 New Fish Species: Bengal Loach, Blue Botia, Candy Basslet, Crimson Loach, Diadem Dottyback, Firetail Dottyback, Redfin Tiger Loach, Rosy Dory, Splendid Dottyback, and Yoyo Loach! Creature & Decoration Overview Window: We know it’s getting a bit crowded in your collection -- so we’ve added new overview windows to help you keep track of all creatures and decorations more easily. New DLC: Round Aquarium & Jellyfish: Yes, graceful jellyfish are now available as downloadable content. Dive in and float away... This DLC also comes with new round tanks for either jellyfish or all your other fish. Bug Fixes Thanks for playing Behind Glass — and happy aquascaping!Read full article on Community Announcements (BitBros Games)
