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Boids

Mod

Boids simulation for flocking fish 🐟

Type

Mod

Modrinth Downloads

2,911,160

Modrinth ID

2OckSy74

Last Updated

Jun 12, 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

Screenshots

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Included in Modpacks

External Resources