It frustrated me when I didn't know what things were but I ran some test mods and found this:
Bloc =
fish_elephantnose_destroyed = Dead Small Fish = FAAE1938
nutblocker_1x1x2 = Nothing = FA4518CF
deadlock_chainlinkgate = Swinging Fence = F9FF1889
deadlock_chainlinkgate_ii = Swinging Fence = FA4B18D5
pipe_block = Nothing = FA5018DA
wall_hatch = Breakable Hatch = F9F0187A
Crea =
fish_elephantnose = Small Fish = FAA0192A
Mach =
switch_lever = Swith Lever = F25510DF
deadlock_gate_v3 = Unlockable Large Gate = F25C10E6
Scen =
deadlock = Mountains and Water = E181000B
warthog_drop_pallete = Warthog Drop Palette = E22D00B7
mongoose_drop_pallete = Mongoose Drop Palette = E23E00C8
Weap =
warthog_horn = Nothing = ECD90B63
I will post other maps. Just thought this would be a quick way of finding out what things are on the map.