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Threshers are blue Metal element Slugs. It is the favourite Slug of Sergent Slug, the owner of Club Slug. When they transform after hitting 100 MPH, they gain characteristics of both a tiger and a shark. The thresher slug is named after the Thresher shark famous for its bony tail.

A Megamorph Thresher is first seen in an official art in Slugterra: Return of the Elementals, while its official appearance is first seen in the Slugisode Trick or Cheat! and Slugterra: Into the Shadows.


  • Protoform Abilities - Can chomp through things.
  • Sawtusk - Huge chomping bite.
  • Throttlebite - Curls into a flat circle and spins like a saw blade, boney spines on the outside to slice things.
  • Trillioblade - Flings saw blades from its tail.
  • Blasterslash - Chomps on to an opponent's blaster then spins like a sawblade, sawing it in half.

Fusion Shots


  • Magma Saw: "Thresher"+"Forgesmelter" - Forms a superheated spinning magma sawblade that spews lava from its sides and can easily melt and cut through most metals.  
  • Slicing Rope: "Thresher"+"Polero" - The Polero grabs the Thresher, spinning it at high speeds, leading to a bolo-like appearance.
  • Toxic Tusk: "Neotox"+"Thresher" - TBD. It hasn't officially appeared in show yet.


Being a useful slug in close quarters combat in addition to a a common one, Threshers are good slugs to have at all times, due to their versatile array of abilities. It's first two moves are useful in attacking slugs that make contact with it, allowing it to continue its path towards the opponent, whereas it's Trillioblade move enables it to attack opponent's out of range. Blasterslash is somewhat a luck-based move, as it involves the Thresher making a direct hit to the opponent's blaster to successfully use, but its worth it as it can completely disable your opponent.

The only downside to the Thresher is that 3 out of 4 of its moves need to make contact with the target to become useful, as an opponent would have an easy time to dodge a Thresher while it is moving in the air. Similarly, slugs with long ranged moves can incapacitate a Thresher before it even uses an attack. This weakness, however, can be exploited by firing another slug in tandem, as your opponent would either have to dodge the Thresher or waste a Slug on it, allowing a second slug to have an easier chance of hitting the opponent.

Outside of battle, a Thresher is useful in situations where its slinger is trapped, as it is strong enough to shred rocks and jungle flora that may restrain its slinger, even when in protoform.



  • A Thresher is the first slug to ever be shot in the series.
  • A Thresher, alongside a Dirt Urchin, are one of the few things that could pop a Bubbaleone.
  • In a Slugisode, it is shown that when a Thresher isn't fired enough, it can have a chipped tooth.
  • While they live in seasides and have the transformed appearance of a shark, a Thresher is Metal-Type instead of a Water-type.


Opening Burpy.png Slugs Tormato ghoul .png

Grimm.png Types of Slugs in SlugTerra
Common Slugs Flopper · Slicksilver · Diggrix · Gazzer · Sand Angler · Slyren · Fandango · Phosphoro · Polero · Tormato · Tazerling · Rammstone · Frostcrawler · Armashelt · Flaringo · Thresher · Jellyish · Lariat · Dirt Urchin · Hop Rock · Grenuke
Uncommon Slugs Thugglet · Negashade · Blastipede · AquaBeek · MakoBreaker · Xmitter · Hoverbug · Flatulorhinkus · Arachnet · Bubbaleone · Speedstinger · Vinedrill · Lavalynx
Rare Slugs Frightgeist · Geoshard · Hexlet · Neotox · Tenasher · Glowbyss
Extremely Rare Slugs Boon Doc · White Boon Doc · Forgesmelter · Firenzar
Ultra Rare Slugs Infurnus · Enigmo · Crystalyd · Hypnogrif · Narwhaddle · Midas
Elemental Slugs Fire Elemental · Water Elemental · Earth Elemental · Air Elemental · Energy Elemental · Toxic Elemental · Electric Elemental · Psychic Elemental · Plant Elemental · Ice Elemental
Ghoul Slugs Darkfurnus · Amperling · Goon Doc · Grimmstone · Harmashelt · Hop Jack · Thrasher · Frostfang · Attacknet · Flatulo Rex · Bubbalash · Nightgeist · Jollyfist · Briardrill · Aquafreak · Vamparo · Blastinger · Barreto · Photomo · Tempesto · Pyringo · Hoverblade · Dark Urchin · Cryscada · Greneater · Gorgemelter · Cryptogrif · Negablade · Terrarix · Megabreaker · Smugglet · Transplitter · Sand Mangler · Vexlet · Neurotox · Ghoul Geoshard · Disastiped
Other Roboslug · Dustpuff · The Universal Slug · Toxis · Slugling
Opening Burpy.png Famous Named Slugs in SlugTerra
Major Normal Slugs Burpy · Joules · Doc · Yang · Ping · Rookie · Bluster · Bludgeon · Stinky · Mo · Dazer · Spooker · Dozer · Digger · Stunts · Bugsy · Banger · Chiller · Spinner · Tangles · Buzzsaw · Burner · Torch · Beeker · Glimmer · Suds · Mucky · Bolo · Goober · Larry · Rocky · Sparky · Noodle · Joo-Joo · Maggs · Rex · Joker · Yin · Beau · Pieper
Major Ghoul Slugs Loki · The Goon · Sparcx
Minor Slugs Butch · Ricochet · Flutter · Windsor · Old Timer · Dizzy · Wheezy