Background

Fish Eat Fish is a classic example of the "eat to grow" arcade format from Indiesoft, a genre concept that predates and directly inspired the later wave of .io games like Agar.io — start small and vulnerable, eat anything smaller than you, and avoid anything bigger until you've grown large enough to dominate the food chain yourself.

Its straightforward, intuitive size-comparison rule (bigger eats smaller, always) is part of why this format has stayed popular across so many different games and eras — there's no ambiguity about what's safe to approach and what isn't, which makes it instantly readable even to brand-new players.

How to Play

• Arrow Keys / Mouse (shown in-game) — swim your fish around the ocean.
• Eat fish smaller than you to grow larger.
• Avoid fish larger than you, which can eat you instead.
• Grow as large as possible while surviving encounters with bigger predators.

Goal & Purpose

The objective is to grow your fish as large as possible by eating smaller fish, all while carefully avoiding bigger predators until you've grown enough to no longer be at risk from them.

Why Play Fish Eat Fish

Its simple, addictive size-based survival loop remains a genre classic. If you enjoy this kind of grow-and-survive gameplay, GBK Games also has Agar.io for a modern multiplayer take on the same idea.