- Loaders
- Fabric
- Downloads on Modrinth
- 3.6M
- Followers on Modrinth
- 755
- versions
- 30
- Updated
- September 16, 2026Sep 16
- Published
- in 2023
At a glance
Install on the server only; players don't need it
Boids
This mod replaces the vanilla fish behavior of flocking fish with a boids simulation.

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:
FAQ
How to install Boids?
Install Fabric for your Minecraft version, download Boids for the same version and loader, put the file into the mods folder and launch the game with the loader profile.
Which Minecraft versions does Boids support?
Boids has builds for Minecraft 1.20–26.3.
Is Boids needed on the server?
Server only — players don't need to install it