Games like Fish Simulator: Aquarium Manager
Games like Fish Simulator: Aquarium Manager include Planet Zoo, Planet Coaster, The Sims™ 4, Minami Lane, and Cities: Skylines. We matched them by the tags players give Fish Simulator: Aquarium Manager on Steam (Idler, Life Sim, Simulation, Underwater, and Management): closest matches first, and among equally close ones the better-known games.

Planet Zoo
Shared: Simulation · Management · Building

Planet Coaster
Shared: Simulation · Management · Building

The Sims™ 4
Shared: Life Sim · Simulation · Building

Minami Lane
Shared: Life Sim · Simulation · Cute

Cities: Skylines
Shared: Simulation · Management · Building

Rusty's Retirement
Shared: Idler · Simulation · Management

Stardew Valley
Shared: Life Sim · Simulation · Relaxing

Cities: Skylines II
Shared: Simulation · Building · Management

Two Point Museum
Shared: Simulation · Building · Life Sim

Shelldiver
Shared: Idler · Management · Simulation

Paralives
Shared: Life Sim · Simulation · Building

Megaquarium
Shared: Simulation · Building · Management

Supermarket Simulator
Shared: Simulation · Management · Life Sim

PC Building Simulator
Shared: Simulation · Management · Building

Mini Motorways
Shared: Simulation · Management · Strategy

inZOI
Shared: Life Sim · Simulation · Building

Aquarium Designer
Shared: Underwater · Life Sim · Idler

Tavern Master
Shared: Simulation · Management · Building

Slime Rancher 2
Shared: Cute · Relaxing · Simulation

Tiny Pasture
Shared: Idler · Cute · Simulation

Dressmaker
Shared: Simulation · Life Sim · Relaxing

Potion Craft: Alchemist Simulator
Shared: Simulation · Management · Relaxing

Gas Station Simulator
Shared: Simulation · Management · Building

Youtubers Life
Shared: Life Sim · Management · Simulation