Catches

Every catch is one roll on a catch table. Pick a table, a bait and a net to see the real odds:

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)

Which table a trap uses

A trap checks these in order and uses the first one that exists:

1. A table for its exact biome, for example fish_trap/warm_ocean. Modded biomes use fish_trap/<namespace>/<biome>.

2. A biome category, matched by biome tag, most specific first:

   Category	Biomes
   Warm Ocean	warm, lukewarm and deep lukewarm ocean
   Cold Ocean	cold, deep cold, frozen and deep frozen ocean
   Swamp	swamp, mangrove swamp
   Ocean	any other ocean (#minecraft:is_ocean)
   River	rivers (#minecraft:is_river)

3. The default table for everywhere else, such as lakes and beaches.

How luck works

Catch tables use Minecraft's own loot weights. Each entry has a weight and a quality, and the trap's luck changes the weight:

luck = bait luck + net luck
effective weight = max(floor(weight + quality × luck), 0)
chance = effective weight ÷ sum of all effective weights

• Junk has negative quality, so luck shrinks it and eventually removes it.
• Treasure has positive quality, so luck makes it more common.
• Ordinary fish have a quality of 0 or −1, so they shift only a little.

For example, in the ocean a Nautilus Lure (luck +5) removes kelp, seagrass and old boots completely, and raises the chance of a Heart of the Sea from 0.7% with Worm Bait to 4.1%.

Catches that need a net

Some entries only roll when a particular net is in the trap. The Rainbow Fish needs a Netherite Net. Without it the entry is skipped entirely and doesn't count towards the total. In the explorer above, these entries show which net they need.