SUBTERRANEAN AERTHAlbie ("Subterranean") (Sapient)
Allmouth
Archerbush
Armadillug
Awfulgutbag
Badger Devil
Barber
Bide Forever
Blackledge
Blindworm
Boreworm
Burnstem
Burrbear
Burrowburr
Cave Ape ("Vantilarg") (Sapient)
Centaurant ("Snappie") (Sapient)
Chainworm
Chokejet
Clamp
Corpseberry
Crawbad (Aquatic)
Crocodile, Cavecroc (Aquatic)
Cutleaf
Cuttlefiend (Aquatic)
Dangler
Deathblob
Deathfisher
Devilmen ("Chittersquee") (Sapient)
Drekker
Drownweed (Aquatic)
Echoer
Fish, Subterranean (Aquatic)
Fisheye/Scalie/Feeler-Face (Shallowshadow, Midgloom) (Sapient)
Flashby
Floater
Fountain Fungus
Garpike (Aquatic)
Gibbat
Glowgrave
Gritleaf
Hagnymph
Harpoonhedge
Harvestman
Heathedge
Hissard ("Theesis'honz")
Hootie (Near Sapient)
Hydraworm (Aquatic)
Impaler
Kicket
Killercat (Aquatic)
Lizard, Lionlizard
Lobber/Lobstermen ("<click-click> Klqk") (Sapient)
Micaman (Sapient)
Moldie ("Whoon")
Moving Mound
Muckdevil (Aquatic)
Nailgrass
Octoplant (Aquatic)
Offalgut
Ohoh
Pixie Dog (Near Sapient)
Quickslime
Rat, Subterranean
Ratoid
Rattie ("Chucksquee")
Rock Gator (Aquatic)
Rock Scorpion
Salamander (Spined) (Aquatic)
Scavenger Worm
Shockshrub
Shrewwolf
Silent Whistler
Slapstick
Slime Creeper
Slimeworm (Aquatic)
Slugbellie/Devole ("Noblest")
Slugbug
Smotherslug
Snail, Cave, Giant Coneshell (Aquatic)
Snake, Arrowsnake
Snake, Caveasp
Snake, Dropsnake
Snakevine
Snapper
Spitslug
Starweed
Steelback
Stickycloak
Stinkplant
Stoatie/Ferretfolk (Sapient)
Stonespear
Stoolie/Shrooman ("Hoo-voo-shush") (Sapient)
Stranglevine
Sweetend
Toppler
Trapbeetle
Trog (Sapient)
Unlife
Vampbug
Wally
Warthill
Webber
Welcome Lamp
Whipsime
Whistler
Wigglehead ("Yilyissith") (Sapient)
Wolfspider, Subterranean
Wolfspider, Large Subterranean
Wolfspider, Great Subterranean
