63%Good matchFish Game
93%65993% positive reviews, Very Positive across 659 reviews·Immersive Sim · Creature Collector
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The Ocean Ecosystem Roguelite. Grow a colorful school of fish with unique abilities and unlock powerful items to help them repel boss invasions. Collect rare fish to complete your peaceful Virtual Tank. Hold the line and surface victorious! The depth is deceiving.
Flounder
Steam
Manage the ecosystem, unlock special fish and items, and survive boss incursions. Every fish has a trick. Every item changes the game. Discover unstoppable combos and conquer each run your way!

Features:

Start each run with a school of Guppies. Grow their population to trigger various spawn conditions. Balance your predator and prey population to set yourself up for the next boss wave.


From time to time, challenging bosses appear to attack your fish. Various fish types will help with your defense. Equip your fish with powerful items, unleash their abilities and keep the ecosystem alive!



Collect coins as you nurture your fish and repel bosses. Spend them wisely at the rotating shop to hold the line!


Before each run, strategize and choose from various persistent items and pets to start your game strong.


Select Zen difficulty to start a peaceful run. Catch fish including rare variants to add them to your collection. Earn coins to display prized fish and enable upgrades for the Virtual Tank to build your dream aquarium!

Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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