Fish Tycoon 2: Virtual Aquarium

Before aquarium games learned to be gentle, Fish Tycoon 2: Virtual Aquarium was already running a tank with teeth. LDW Software, the studio behind the original 2004 cult classic, rebuilt the concept in April 2017 as a free-to-play real-time world: you start with a few eggs, crossbreed your way toward more than 400 species of fish, and sell the offspring in a shop you renovate into a proper aquarium showroom. It is part Tamagotchi, part genetics lab, part retail sim, and entirely incapable of pausing.

What the loop feels like

You drag two adult fish together, wait out the egg timer, and net a fry whose colour and body shape depend on the parents you chose, which is the moment the game turns into combinatorics with fins. Sell the common ones at your shop counter, bank the money, and put the interesting pairing in a spare tank. That's Fish Tycoon 2.

Then you close the app, and the world keeps going without you: fish grow for hours, the tank gets dirty, food runs out, and a fish that was fine at lunch can be sick by dinner. You come back to either a tank of healthy adults ready to sell or a small financial tragedy and a bill for the cure. That's Fish Tycoon 2.

How it actually works

The breeding and genetics engine is the core: every fish carries traits for body shape, patterns and value, and crossbreeding is how the species collection log fills in, with the seven legendary Magic Fish as the finish line, each one holding an environmental or financial power like the Magic Fish of Nutrition. Around it sits the store front economy, where you set prices on displayed fish to fund the research and technology tree covering advertising, environment handling, healing and tank equipment.

The veteran playbook, distilled from years of LDW forum threads: buy the Plant of Nutrition first, then the Cleaning Snail, then Environment Level 2, and only then chase pretty decorations or mystery eggs. Breed cheap, fast baseline fish to stabilise cash flow before experimenting, never sell a Magic Fish once found, use secondary tanks as quarantine for sick fish and rare experiments, and tap the entrance mascot during active play to spike store popularity.

Where it stumbles

The real-time persistence cuts both ways, and mostly it cuts you. Fish take hours to mature but can die within minutes of neglect, and returning to dead stock with no capital to recover is the single most cited dealbreaker. The economy is balanced to make waiting painful, with upgrades and cures priced far above what starter fish earn, so progress stalls into either patience or payment. Between the timers there is very little to actually do, and the mobile-era design shows its age badly against modern successors that let the fish simply live.

Playing it today

Free on both stores with in-app purchases, and carried these days by nostalgia as much as design. Get it on the App Store for iOS or on Google Play for Android. If you want the aquarium fantasy without the mortality anxiety, our Tap Tap Fish: AbyssRium page is the soothing end of the genre, and our Fish Inc page is the idle-economy version.

The verdict

A genuinely one-of-a-kind breeding sim wrapped in a monetisation model that treats your absence as a billable event. Worth it for genetics hobbyists and 2004 nostalgics, hard to recommend to anyone who has ever left the house.