Catch tables

Catch tables are normal loot tables of type minecraft:fishing, stored in data/fishtrap/loot_table/fish_trap/.

{
  "type": "minecraft:fishing",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        { "type": "minecraft:item", "name": "minecraft:cod", "weight": 50, "quality": -1 },
        { "type": "minecraft:item", "name": "minecraft:stick", "weight": 6, "quality": -2 },
        { "type": "minecraft:item", "name": "minecraft:name_tag", "weight": 1, "quality": 2 }
      ]
    }
  ]
}

Use weight and quality for rarity. The bait's luck is passed to the roll, so you do not need any custom functions. Everything vanilla loot tables support, such as functions and conditions, works too.

Table lookup

For a trap in biome <namespace>:<biome>, the first table that exists is used:

1. fishtrap:fish_trap/<biome> for vanilla biomes, or fishtrap:fish_trap/<namespace>/<biome> for modded ones
2. the first matching biome category
3. fishtrap:fish_trap/default

So a datapack can add a table for a single biome, for example fish_trap/mangrove_swamp.json, and it takes over from the swamp category there.

Biome categories

Categories are checked in this order:

Table	Biome tag
warm_ocean	#fishtrap:fish_trap/warm_ocean
cold_ocean	#fishtrap:fish_trap/cold_ocean
swamp	#fishtrap:fish_trap/swamp
ocean	#minecraft:is_ocean
river	#minecraft:is_river

To send a modded biome to a category, add it to the tag:

// data/fishtrap/tags/worldgen/biome/fish_trap/swamp.json
{
  "values": ["examplemod:bayou"]
}

Catches that need a net

The trap's net is passed to the roll as the loot tool, so an entry can require one with minecraft:match_tool. See Net files for an example.

Built-in tables

Bait Plant Bait (luck -1)Worm Bait (luck 0)Fish Chum (luck +1)Glow Bait (luck +2)Prismarine Lure (luck +3)Nautilus Lure (luck +5) Net No netCopper Net (luck +0.5)Iron Net (luck +1)Gold Net (luck +2)Diamond Net (luck +2)Netherite Net (luck +3)Total luck -1

• 
  Cod33.3%

  weight 35 · quality -1 → 36
• 
  Salmon19.4%

  weight 20 · quality -1 → 21
• 
  Raw Mackerel13.9%

  weight 15 · quality 0 → 15
• 
  Kelp9.3%

  weight 8 · quality -2 → 10
• 
  Raw Lobster6.5%

  weight 8 · quality +1 → 7
• 
  Bone6.5%

  weight 5 · quality -2 → 7
• 
  Ink Sac5.6%

  weight 5 · quality -1 → 6
• 
  Raw Crab2.8%

  weight 4 · quality +1 → 3
• 
  Fish Chum2.8%

  weight 3 · quality 0 → 3
• 
  Prismarine Lure0%

  weight 1 · quality +2 → 0
• 
  Nautilus Shell0%

  weight 1 · quality +2 → 0
• 
  Heart of the Sea0%

  weight 1 · quality +1 → 0
• 
  Rainbow Fish—

  Needs Netherite Net

neutral junk (negative quality) treasure (positive quality)