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Boids

Mod

Boids simulation for flocking fish 🐟

Type

Mod

Modrinth Downloads

3,407,142

Modrinth ID

2OckSy74

Last Updated

Sep 11, 2026

Description

Boids

This mod replaces the vanilla fish behavior of flocking fish with a boids simulation.

A flock of fish in front of a white concrete wall

What's a Boids Simulation?

A "boids simulation" refers to a computer model that simulates the flocking or herding behavior observed in nature, like the coordinated movement of birds or fish. In the context of this mod, it means fish will exhibit more realistic and dynamic group movements, making your aquatic environments come to life.

In particular, each fish will follow these three rules:

  • Separation: steer to avoid crowding local flockmates
  • Alignment: steer towards the average heading of local flockmates
  • Cohesion: steer to move towards the average position (center of mass) of local flockmates

Additional Resources

You can learn more about boids simulations here:

Compatibility

Mod Loaders

Fabric

Game Versions

1.20 1.20.1 1.20.2 1.20.3 1.20.4 1.20.5 1.20.6-rc1 1.20.6 1.21 1.21.1 +11 more

Recommended Gear

Affiliate

Hardware and extras that pair well with this mod.

LEGO Minecraft Set

LEGO Minecraft Set

Official sets that translate the building side of the game off-screen.

View on Amazon →

As an Amazon Associate I earn from qualifying purchases.

Screenshots

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Included in Modpacks (33)

Most downloaded
Aged Aged Elysium Days Elysium Days Better Adventures++ Better Adventures++ My Biome Is So Beautiful My Biome Is So Beautiful RLFabric RLFabric Cold Soul Cold Soul Realistic Minecraft - Frealism Realistic Minecraft - Frealism Cataclysmic Cataclysmic VBots x Down to Earth: Summer 2026 VBots x Down to Earth: Summer 2026 Vanilla QOL Improved Vanilla QOL Improved VisualCraft by Moizoref VisualCraft by Moizoref CobbleVentures CobbleVentures Vanilla+ Game Vanilla+ Game Vanilla Horizons Vanilla Horizons Aged Multi (Light) Aged Multi (Light) Shenanigans Shenanigans Trailer Vibes Trailer Vibes Lively Craft Lively Craft Redstone Witch [Lite] Redstone Witch [Lite] Wen's Create Experience Wen's Create Experience
Show all 33 modpacks

External Resources

Modrinth Source Code Issues