Darwin Fish
Darwin Fish, a Forge and NeoForge mod, adds fish that breed, lay eggs and hatch on their own, with pike that hunt their own food.
What it does
Breeding can be done two ways. In manual mode, two adult fish fed seagrass or kelp become a pair and deposit eggs near the floor of a water body. In natural mode, a toggled config option lets fish graze on submerged plants and spawn eggs with no action from the player. Eggs appear as physical egg blocks placed on the ground, and their color shifts with the genetics of the parents.
Growth runs on in-game days. An egg needs one day to hatch into a fry, and a fry needs another full day to mature into an adult, and both timings can be adjusted. Offspring take on traits from their parents, including base hue, pattern hue and build. Pike follow a separate diet rule: with natural breeding disabled, a pike must consume two randomly chosen fish each day to stay alive, and in natural mode a pair of pike lays eggs after a successful hunt. Pike also attack other adult pike and their own young, so the mod trades peaceful breeding for predation.
Key features
Manual breeding
Two adult fish fed seagrass or kelp become a pair and deposit eggs near the floor of the water.
Natural breeding
A toggled config lets fish graze on submerged plants and spawn eggs with no action from the player.
Growth cycle
Eggs hatch after one in-game day and fry mature into adults after another full day, with timings adjustable.
Inherited appearance
Offspring take on the hue, pattern and build of their parents, and egg blocks change color with their genetics.
Pike diet and hunting
Pike actively hunt and eat two random fish per in-game day, and in natural mode they breed after a successful hunt.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Nature's Appetite is a Forge and NeoForge mod for 1.20.1 – 1.21.1 under the GNU General Public License v3.0 or later, and it is open source. LetMoreFishLove is published for 1.19.2 – 1.20.1 under the MIT License and is open source. Darwin Fish covers the same 1.20.1 – 1.21.1 range as Nest Egg and shares its MIT License and open source status, so the two differ mainly in their breeding rules.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Darwin Fish | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-05-10 |
| Nature's Appetite | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-04-09 |
| LetMoreFishLove | Forge and NeoForge | 1.19.2 – 1.20.1 | Client and server | 2024-09-07 |
| Nest Egg | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-08-15 |
Questions
Does Darwin Fish need any other mod?
Does the server need Darwin Fish?
How do pike get food when natural breeding is off?
In the catalog
Darwin Fish is one of 6,151 Food mods on ModsFinder, and one of 3,337 Food mods for Forge. 32,366 mods support Minecraft 1.21.1.
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What the author says
DarwinFish is a mod that overhauls the underwater ecosystem in Minecraft. It replaces static fish behavior with a dynamic lifecycle, introducing breeding mechanics, genetics, a food chain, and new culinary options.
Official listing
- Modrinth page
- modrinth.com/mod/darwin-fish
- Owner
- _retrospective_
- Published
- 2026-05-09
- Updated on Modrinth
- 2026-05-10
- Facts verified
- 2026-10-15