diff --git a/mods/ENTITIES/mcl_mobs/spawning.lua b/mods/ENTITIES/mcl_mobs/spawning.lua
index b56fe1cee..9ea774ba9 100644
--- a/mods/ENTITIES/mcl_mobs/spawning.lua
+++ b/mods/ENTITIES/mcl_mobs/spawning.lua
@@ -1,3 +1,166 @@
+--[[ 
+
+THIS IS THE BIG LIST OF ALL BIOMES - used for programming/updating mobs
+
+underground:
+FlowerForest_underground
+JungleEdge_underground
+StoneBeach_underground
+MesaBryce_underground
+Mesa_underground
+RoofedForest_underground
+Jungle_underground
+Swampland_underground
+MushroomIsland_underground
+BirchForest_underground
+Plains_underground
+MesaPlateauF_underground
+ExtremeHills_underground
+MegaSpruceTaiga_underground
+BirchForestM_underground
+SavannaM_underground
+MesaPlateauFM_underground
+Desert_underground
+Savanna_underground
+Forest_underground
+SunflowerPlains_underground
+ColdTaiga_underground
+IcePlains_underground
+IcePlainsSpikes_underground
+MegaTaiga_underground
+Taiga_underground
+ExtremeHills+_underground
+JungleM_underground
+ExtremeHillsM_underground
+JungleEdgeM_underground
+
+ocean:
+RoofedForest_ocean
+JungleEdgeM_ocean
+BirchForestM_ocean
+BirchForest_ocean
+IcePlains_deep_ocean
+Jungle_deep_ocean
+Savanna_ocean
+MesaPlateauF_ocean
+ExtremeHillsM_deep_ocean
+Savanna_deep_ocean
+SunflowerPlains_ocean
+Swampland_deep_ocean
+Swampland_ocean
+MegaSpruceTaiga_deep_ocean
+ExtremeHillsM_ocean
+JungleEdgeM_deep_ocean
+SunflowerPlains_deep_ocean
+BirchForest_deep_ocean
+IcePlainsSpikes_ocean
+Mesa_ocean
+StoneBeach_ocean
+Plains_deep_ocean
+JungleEdge_deep_ocean
+SavannaM_deep_ocean
+Desert_deep_ocean
+Mesa_deep_ocean
+ColdTaiga_deep_ocean
+Plains_ocean
+MesaPlateauFM_ocean
+Forest_deep_ocean
+JungleM_deep_ocean
+FlowerForest_deep_ocean
+MushroomIsland_ocean
+MegaTaiga_ocean
+StoneBeach_deep_ocean
+IcePlainsSpikes_deep_ocean
+ColdTaiga_ocean
+SavannaM_ocean
+MesaPlateauF_deep_ocean
+MesaBryce_deep_ocean
+ExtremeHills+_deep_ocean
+ExtremeHills_ocean
+MushroomIsland_deep_ocean
+Forest_ocean
+MegaTaiga_deep_ocean
+JungleEdge_ocean
+MesaBryce_ocean
+MegaSpruceTaiga_ocean
+ExtremeHills+_ocean
+Jungle_ocean
+RoofedForest_deep_ocean
+IcePlains_ocean
+FlowerForest_ocean
+ExtremeHills_deep_ocean
+MesaPlateauFM_deep_ocean
+Desert_ocean
+Taiga_ocean
+BirchForestM_deep_ocean
+Taiga_deep_ocean
+JungleM_ocean
+
+water or beach?
+MesaPlateauFM_sandlevel
+MesaPlateauF_sandlevel
+MesaBryce_sandlevel
+Mesa_sandlevel
+
+beach:
+FlowerForest_beach
+Forest_beach
+StoneBeach
+ColdTaiga_beach_water
+Taiga_beach
+Savanna_beach
+Plains_beach
+ExtremeHills_beach
+ColdTaiga_beach
+Swampland_shore
+MushroomIslandShore
+JungleM_shore
+Jungle_shore
+
+dimension biome:
+Nether
+End
+
+Overworld regular:
+Mesa
+FlowerForest
+Swampland
+Taiga
+ExtremeHills
+Jungle
+Savanna
+BirchForest
+MegaSpruceTaiga
+MegaTaiga
+ExtremeHills+
+Forest
+Plains
+Desert
+ColdTaiga
+MushroomIsland
+IcePlainsSpikes
+SunflowerPlains
+IcePlains
+RoofedForest
+
+I have no idea:
+ExtremeHills+_snowtop
+MesaPlateauFM_grasstop
+JungleEdgeM
+ExtremeHillsM
+JungleM
+BirchForestM
+MesaPlateauF
+MesaPlateauFM
+MesaPlateauF_grasstop
+MesaBryce
+JungleEdge
+SavannaM
+]]--
+
+
+
+
 local mobs_spawn = minetest.settings:get_bool("mobs_spawn", true) ~= false
 -- count how many mobs of one type are inside an area
 --[[