- New Fish Species & Decoration Pack DLC - 13 July 2026
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!
- Meet 20 New Species - 16 February 2026
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 Orang…
- Meet the New Species - 24 November 2025
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 cichlid
- 20 New Fish Species + Recolor Your Gravel - 8 July 2025
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!
- New Fish, Jellyfish, Round Aquariums - 16 April 2025
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!
- Axolotl, turtles, full version - 9 January 2025
Behind Glass is Leaving Early Access! What’s New in the Full Release: The Axolotl joins the species list. Six turtle species now swim alongside your fish. 10 new fish species to further diversify your aquariums (Redstriped eartheater, Mdoka White Lips, Blue acara, Severum Cichlid, Upside-down Catfish, Longnose butterfly fish, African moony, Aberrant Tricolor Scopas Tang, Narrow-barred Butterflyfish, Whitemargin unicornfish). Adjust the Bubble volume for a better audio experience. Improved translations for the main languages of our player base. Numerous bug fixes for a smoother experience. This is not the end — updates will continue to roll out, with a focus on introducing new content in the future. Thank you to everyone who supported us and contributed valuable feedback throughout Early Access. We’re excited for you to enjoy the full experience!
- A Crabby Update - 3 June 2024
This update features a revamped crab engine, enhancing your existing crabs and introducing two new species. Use the recoloring feature to fill your aquarium with a variety of bustling crabs. We've addressed feedback regarding the fish limit, which exists primarily for performance reasons on slower devices. You can now double the maximum number of creatures via the settings menu. Please proceed with caution, as this will increase the computational load on your device. As always, we've fixed several minor bugs based on your reports.
- New Fish Arrivals - 17 October 2023
It's time for an update once more. To put it simply: Our focus has been on fish diversity, and we're delighted to introduce 81 new fish species. Enjoy! For a list of all 193 species, please see the pinned post in Discussions. New species: African banded barb Arabian butterflyfish Assasi triggerfish Bicolor blenny Bicolor dottyback Blackbar soldierfish Blackspot angelfish Blackspotted wrasse Blackstriped angelfish Blood Parrot Cichlid Bloodtail Tetra Bluecheek butterflyfish Cardinal Tetra Carpenter’s wrasse Checked swallowtail Checkerboard barb Clarion angelfish Clown barb Clown tang Cocoa damselfish Convict Cichlid Denison barb Dispar anthias Flameback Angelfish Foxface Gem tang Giraffe Cichlid Glowlight Tetra Golden Mbuna Golden Pencilfish Goldspotted Spinefoot Grants Peacock Half-and-half chromis Imaculate damsel Japanese angelfish Lined Barb Magnificent rabbitfish Margined coralfish…
- Update notes 04/07/2023 - 4 July 2023
It is update time again. So what is new? - We are introducing the new plant engine, which brings a fresh look to planted aquariums in Behind Glass. Be prepared for a visual upgrade and some changes: all plants, including existing ones, have been given a makeover. - We feature four new plant species: Tiger Lotus, Red Water Lily, Water Wisteria, and Hygrophila Pinnatifida. - We've added new handles for smoother movement and rotation controls for your decoration. The existing rotation buttons are still around as well. - Get ready to immerse yourself in dense underwater forests with our new shadow setting, "Extreme". This setting significantly improves the visuals but comes with a heavy performance impact. It is thus not enabled by default. - We've made changes to the photo mode, ensuring that screenshots are now captured in the highest quality, regardless of your in-game settings. - The aq…
- Fixes and additions - 14 April 2023
This time around, it is a smaller update. The main reason is that we have identified some smaller issues, which should be addressed. Luckily, this also gives us the opportunity to integrate some new features and enhancements that we've been perfecting since last week's major update. Additions: - New scattered item: seashells - New deco: new life rock and 2 new types of wood - You can now view the interplay of different water properties and water-chemistry concepts: There is a second tab in the (individual) charting window Fixes: - Fixed unresponsiveness of tabs in Help window - Reduced memory issue on first startup (when various thumbnails are computed). This should reduce / eliminate startup crashes! - Further reduction of micro stutters -- please give us feedback whether we improved further! - Fixed Depth of Field issue - Fixed rounding issue when using specific gravity as salinity un…
- All-new interface - 4 April 2023
It is update time once again. So what's new before Easter? Get ready to meet new aquatic creatures: Guppy, Domino Damselfish, Six Line Wrasse, Coral Beauty Angelfish, and Maroon Clownfish. We have added more decoration options (stones, root), meaning more possibilities for your aquascape. See your fish in a whole new light with upgraded movement and behavior (e.g., schooling behaviour, fish getting trapped). Most importantly, we bring you an all-new user interface. Here are some details: - We unified and improved the whole UI after having made various changes and having added various features with recent updates - Reordering tanks and your creature library is now done via drag and drop - The simulation mode, now being a mature part of the game, got a fitting UI - The simulation mode, for ease of use, now allows (exactly) one dosing pump, one CO2 diffuser, and one O2 diffuser; the heater…
- Update notes 16 January 2023 - 16 January 2023
We hope you are enjoying the new simulation mode! This update brings some extensions for your simulation as well as general additions. General: We have added some new coral species Improved ambient occlusion (can be switched off in Setting menu) Simulation: You now need to clean/replace your filter media, as well as clean your filter. This option can be disabled in the Settings menu (it is a game setting, not an overall setting) We added a purifying filter medium Charts now show the current reading directly, so no need to hover over the green/yellow/red bar or click the small question mark anymore The water changer now allows you to specify changes up to 100%. There is also a "Change Now" button to manually trigger a change according to your configuration Hovering over a water parameter's red bar or clicking the small question mark now also shows what can be done to fix this issue. You…
- Update notes 09/12/2022 - 9 December 2022
It has been some time since the last update. We have had quite some work to do, and have now decided to roll out a first version of our new simulation mode, involving water chemistry! Some notes to get you transitioned: When executing Behind Glass, you will now get a launch screen, letting you choose between different save games, and letting you start a new game in two different sandbox modes: Designer -- this is what you know until now, our aquascaping tool, letting you create your favorite tanks! Your previous game session is running in this mode. Simulator -- this is the new simulation mode, involving water chemistry. Please note that the current state is just the beginning of this new mode, so expect improvements and additions over time! The simulation mode is currently intended for "aquarists knowing what they need to do" -- there is no tutorial and no extensive documentation as of…
- New fish, deco and fixes - 17 August 2022
While still working on our water chemistry module, we have prepared a smaller update to shorten the waiting time for you: There is 10 new species: Banded angelfish, Convict surgeonfish, Emperor angelfish, Midget sucker catfish, Ornate butterflyfish, Pictus catfish, Spotted bristletooth tang, Sterba's corydoras, Tete sea catfish, and Zebra pleco We also have some new decoration items and plants: bricks, clay pots, giant clam, Anubias Barteri As requested by some players, you can now mark your workshop aquariums to be copyable by subscribers (this request was actually from subscribers, so not sure if contributors will actually use this) Sucker catfish behavior has been improved -- they are now more active on your aquarium glass Thanks to various reports, we have fixed a large amount of issues when cross-breeding your favorite species We have improved the feeding behavior of your fish (it…
- Update notes 19/05/2022 - 19 May 2022
We have been preparing another update for our aquarists and aquascapers: You can now choose between day and night mode. Night mode currently disables your lightning. The future might bring further specifications here. In Photo mode, we have added the new feature of an underwater drone, allowing you to enjoy and gets shots of your tanks from new perspectives. We hope this feature will trigger lots of new screenshots! We now support moving your fish to another tank, so distributing your recolored creations among your tank becomes easily possible. Smaller fish can now act as food to large species. You need to actively enable this feature in the Settings menu though! We have added 10 new species: Lined Puller, Rosy Barb, Rainbow shark, Marbled Hatchetfish, Bleeding heart tetra, Chili Rasbora, Achilles tang, Mask Cichlid, Convict Julie, and Red Toothed Trigger. As usual, we have fixed bugs a…
- Update notes 09/04/2022 - 9 April 2022
We have gotten quite an amount of new users during Simfest: Hobby Edition lately. Thanks to you for joining our community! While gladly watching this happen, we have prepared an update for all our loyal players: You can now recolor your fish! Recoloring works by replacing up to six colors of your fish with other colors. For each source color to be replaced, you can define a tolerance, stating what "distance" from the source color is allowed to be replaced. If you know our previous mobile games, this new recoloring scheme is much more flexible than it was. Please allow for some time to get used to the recoloring functionality though -- you will soon be able to create colorful fish of your liking! And it gets even better, as you can obviously recolor your crossbreeds as well. Please note that recoloring takes place on individual creatures, not species. There are five new species: Clown Lo…
- Update notes 17/03/2022 - 17 March 2022
We are happy to announce a shiny new feature within Behind Glass: the Breeding Lab. Players having played our mobile Fish Farm series might know this unique cross-breeding feature very well. In the Breeding Lab, you can select two different species of fish as parents, and create an "unlimited" amount of uniquely looking children. You can then store your creations in your Breed Library, allowing you to add these hybrid species to your aquariums in the same way you do with ordinary species. Please note that the current implementation is not fully polished yet and thus in a "kind of experimental" state. This basically means for you that the appearance of some cross-breeds might still be imperfect and change with future updates. Apart for this, we have doubled the maximum allowed vertex count per aquarium, meaning you can put in more decoration items and fish. As usual, smaller bugs have be…
- Update notes 07/02/2022 - 7 February 2022
This update mainly brings new content: 1) We have added 14 new fish species: Agassiz's dwarf cichlid Sardine Cichlid Rummynose tetra Six-barred Lamprologus Diamond tetra Redeye tetra Bloodfin tetra Cherry barb Odessa Barb Celestial pearl danio Fiji anemonefish Red sea clownfish Mauritian anemonefish Pajama cardinal 2) We have added new decoration items and scattered items. There is a particular focus on items allowing you to design black water tanks. 3) You can now buy multiple fish at once (when using the popup instead of drag/drop for adding fish) 4) As usual, we have fixed minor bugs (and hopefully not introduced new ones...)
- Update notes 25/01/2022 - 25 January 2022
We hope you can enjoy the new features and changes in this update: You can now place your aquariums in room. You can select from initially two apartments, having 3 to 4 possible spots for your aquarium. Please note that each spot has a maximum dimension for the aquarium it can accomodate. You can select your apartment and spot when adding an aquarium (your allowed aquarium size is then limited to the maximum dimension), or alter the apartment and spot for an already created aquarium (you can only select spots that allow for an aquarium of its size). Feel free to show/hide the apartment at any time (next to the 2d mode toggle). In Photo mode, you can choose between different preset camera positions within the apartment (you cannot move freely -- Behind Glass is an aquarium simulation). You can choose a new kind of background: 3D backgrounds Once selected, you can choose between randomly…
- Update available soon - 21 January 2022
The next update is in the final stages of testing! Our main additions are: - You can now place your aquarium in a room - We have added three-dimensional backgrounds (in your tank) - We have decreased the minimum and increased the maximum tank size
