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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:
All Versions
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[2.0.0+26.3] 2.0.0+26.3
by Tomate0613 on Oct 09, 2026
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- update to 26.3
[2.0.0+26.2] 2.0.0+26.2
by Tomate0613 on Oct 09, 2026
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- update to 26.2
[2.0.0+26.1] 2.0.0+26.1
by Tomate0613 on Oct 09, 2026
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- Update to 26.1
[2.0.1+1.21.11] 2.0.1+1.21.11
by Tomate0613 on Oct 09, 2026
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- Fix #23 (Incorrect fish grouping)
- Update fmj
[2.0.3+1.21.2] 2.0.3+1.21.2
by Tomate0613 on Oct 09, 2026
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- Fix #23 (Incorrect fish grouping)
- Update fmj
[2.0.4+1.21] 2.0.4+1.21
by Tomate0613 on Oct 09, 2026
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- Fix #23 (Incorrect fish grouping)
[2.0.4+1.21.9] 2.0.4+1.21.9
by Tomate0613 on Oct 09, 2026
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- Fix #23 (Incorrect fish grouping)
[2.0.3+1.20.1] 2.0.3+1.20.1
by Tomate0613 on Oct 09, 2026
Download
- Fix #23 (Incorrect fish grouping)
- Update fmj
[2.0.0+1.21.11] 2.0.0+1.21.11
by Tomate0613 on Oct 09, 2026
Download
- update to 1.21.11
[2.0.3+1.21.9] 2.0.3+1.21.9
by Tomate0613 on Oct 09, 2026
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- update fmj
[2.0.3+1.21] v2.0.3+1.21
by Tomate0613 on Oct 09, 2026
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- Fix crash with fishing real by @morch20 in https://github.com/Tomate0613/boids/pull/33
## New Contributors
- @morch20 made their first contribution in https://github.com/Tomate0613/boids/pull/33
[2.0.2+1.21.9] Boids 2.0.2+1.21.9
by Tomate0613 on Oct 09, 2026
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- Port to 1.21.9 by @WildToastyMop in https://github.com/Tomate0613/boids/pull/29
[2.0.2+1.20.1] Boids 2.0.2+1.20.1
by Tomate0613 on Oct 09, 2026
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- No longer default incorrect entity ids to pig
[2.0.2+1.21] Boids 2.0.2+1.21
by Tomate0613 on Oct 09, 2026
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- No longer default incorrect entity ids to pig
[2.0.1+1.21] 2.0.1+1.21
by Tomate0613 on Oct 09, 2026
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- Fix boids not affecting mobs from other mods sometimes
[2.0.1+1.21.2] Boids 2.0.1+1.21.2
by Tomate0613 on Oct 09, 2026
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- Fix boids not affecting mobs from other mods sometimes
[2.0.1+1.20.1] 2.0.1+1.20.1
by Tomate0613 on Oct 09, 2026
Download
- Fix boids not affecting mobs from other mods sometimes
[2.0.0+1.21.2] Boids 2.0.0+1.21.2
by Tomate0613 on Oct 09, 2026
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## General Changes
## Config changes
Added new config options
- Boids simulation code has been rewritten
- Tweaked default values
- Fish from other mods will no longer have boids behaviour by default
- Updated fishing real compat
## Config changes
Added new config options
- Influence angle for separation, alignment and cohesion
randomnessRandom influence
defaultEntitiesBase list of mobs the boids behaviour applies toincludedEntitiesList of entities that are additionally influencedexcludedEntitiesList of entities that are blacklisted
[2.0.0+1.21] Boids 2.0.0+1.21
by Tomate0613 on Oct 09, 2026
Download
## General Changes
## Config changes
Added new config options
- Boids simulation code has been rewritten
- Tweaked default values
- Fish from other mods will no longer have boids behaviour by default
- Updated fishing real compat
## Config changes
Added new config options
- Influence angle for separation, alignment and cohesion
randomnessRandom influence
defaultEntitiesBase list of mobs the boids behaviour applies toincludedEntitiesList of entities that are additionally influencedexcludedEntitiesList of entities that are blacklisted
[2.0.0+1.20] Boids 2.0.0+1.20
by Tomate0613 on Oct 09, 2026
Download
## General Changes
## Config changes
Added new config options
- Boids simulation code has been rewritten
- Tweaked default values
- Fish from other mods will no longer have boids behaviour by default
- Updated fishing real compat
## Config changes
Added new config options
- Influence angle for separation, alignment and cohesion
randomnessRandom influence
defaultEntitiesBase list of mobs the boids behaviour applies toincludedEntitiesList of entities that are additionally influencedexcludedEntitiesList of entities that are blacklisted
[1.2.3] Boids 1.2.3
by Tomate0613 on Oct 09, 2026
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- Update to 1.21
- Make fish jumping out of water more unlikely
[1.2.2] Boids 1.2.2
by Tomate0613 on Oct 09, 2026
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- Compile with java 17
- Fixes crash with java 17
[1.2.1] Boids 1.2.1
by Tomate0613 on Oct 09, 2026
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- Add a basic config
- Add
/boids config reloadcommand
[1.1.1] Boids 1.1.1
by Tomate0613 on Oct 09, 2026
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Update to 1.20.5
[1.1.1] Boids 1.1.1
by Tomate0613 on Oct 09, 2026
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1.20.1
[1.1.1] Boids 1.1.1
by Tomate0613 on Oct 09, 2026
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- Fix unexpected behaviour when fish die
[1.1.0] Boids 1.1.0
by Tomate0613 on Oct 09, 2026
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- Fix flying fish
[1.0.2] Boids 1.0.2
by Tomate0613 on Oct 09, 2026
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- Add icon
[1.0.1] Boids 1.0.1
by Tomate0613 on Oct 09, 2026
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- Change loader version to 0.15.1
- Improve mod compatibility
- Clean up code
![[EMF] Entity Model Features](uploads/icons/thumbs/emf-entity-model-features_27aff805_thumb.jpg){kind=icon}
