“No one deserves to be held captive, not even a monster.”
The Leviathan
Element N/A
Habitat Endless Sea

The Leviathan is an enormous sea creature native to the Endless Sea. It resembles an octopus, apart from having three snake-like eyes at the tip of one tentacle.


The Last Voyage

The Leviathan was captured by Samukai in order to guard Dr. Julien in the Lighthouse Prison. Shortly after the Ninja arrived at the lighthouse, the creature investigated the tower, but the scientist was able to conceal their presence from the creature.

Later, the Leviathan attacked the Destiny's Bounty when it attempted to escape the island. The Ninja were unable to escape the beast's tentacles, but Zane noticed a great chain binding the Leviathan to the seabed. Diving underwater, the White Ninja used a group of nearby Starteeth to destroy the chain - moments later, the freed Leviathan released the Destiny's Bounty. As both the ship and the creature left the island, Sensei Wu asked Zane how he saved them, to which Zane replied that he had realized that the Leviathan was just as much a prisoner of the island as Dr. Julien had been.

Grave Danger

Dwelling in the waters near the Tomb of the First Spinjitzu Master, the Leviathan noticed the Ninja traveling within R.E.X. Disregarding its prior gratitude in favor of a meal, it took chase after them, attacking R.E.X. and cracking the windshield with its tentacle. Outmaneuvering the beast, R.E.X. managed to swim through a small hole in a stone formation that the Leviathan attempted to follow in, getting trapped in the process due to its large size and leaving the beast to thrash in frustration.

Dark Island Trilogy, Part 1

Traveling along the Island of Darkness coast, the Leviathan became exposed to the Dark Matter in the water, causing it to emanate a purple aura. Noticing an arguing Ronin, Jay, Nya, and Sky Pirates near the shore, the beast took advantage of their distraction to swipe up Ronin, intending to devour the mercenary. However, Jay and Nya succeeded in rescuing Ronin, even as the Sky Pirates fled. Summoning his Salvage M.E.C. to his aid, Ronin proceeded to fire at the Leviathan, wounding and scaring it off from the coastline.


LEGO Ninjago: Masters of Spinjitzu

Season 2: The Final Battle

Season 5: Possession


  • The Leviathan is based off of the mythical creature with the same name.




Master Wu · Cole · Zane · Jay · Nya · Kai · Lloyd
Allies: Misako · Dr. Julien · Falcon · Master Garmadon · Cyrus Borg · P.I.X.A.L. · Ronin


Samukai · Wyplash · Kruncha · Frakjaw · Chopov · Nuckal · Krazi · Bonezai


Anacondrai: Arcturus · Pythor P. Chumsworth
Fangpyre: Fangtom · Fangdam · Fang-Suei · Snappa
Venomari: Acidicus · Lizaru · Spitta · Lasha · Zoltar
Constrictai: Skalidor · Bytar · Chokun · Snike
Hypnobrai: Skales · Slithraa · Mezmo · Rattla
Other: The Great Devourer

Stone Army

Creator: The Overlord
General Kozu · Giant Stone Warrior · Stone Warrior · Stone Swordsman · Stone Scout


General Cryptor · Nindroid Drone · Nindroid Warrior · Min-Droid

Anacondrai Cultists

Chen · Clouse · Zugu · Eyezor · Kapau · Chope · Krait · Sleven

Elemental Masters

Ash · Bolobo · Master of Shadow · Paleman · Karlof · Tox · Shade · Neuro · Master of Gravity · Gravis · Griffin Turner · Maya · Ray · Skylor

Ghost Warriors

Leader: The Preeminent
Morro · Chain Master Wrayth · Blade Master Bansha · Scythe Master Ghoultar · Bow Master Soul Archer
Ghost Ninja: Attila · Hackler · Howla · Ming · Spyder · Wooo
Ghost Warriors: Cowler · Cyrus · Ghurka · Pitch · Pyrrhus · Wail · Yokai

Sky Pirates

Leader: Nadakhan
Flintlocke · Dogshank · Doubloon · Monkey Wretch · Clancee · Bucko · Sqiffy · Cyren


Acronix · Krux · General Machia · Commander Raggmunk · Commander Blunck · Vermin · Rivett · Slackjaw · Tannin


Grundle · Spykor · Starteeth · The Leviathan · Treehorn · Craglings · Mud Monsters · Ice Serpent · Walliper
Dragons: Fire Dragon · Lightning Dragon · Earth Dragon · Ice Dragon · Ultra Dragon
Elemental Dragons: Golden Dragon · Elemental Earth Dragon · Elemental Fire Dragon · Elemental Form Dragon · Elemental Gravity Dragon · Elemental Lightning Dragon · Elemental Metal Dragon · Elemental Mind Dragon · Elemental Nature Dragon · Elemental Poison Dragon · Elemental Shadow Dragon · Elemental Smoke Dragon · Elemental Speed Dragon · Titanium Dragon


Bizarro Ninja · Brad Tudabone · Carridi · Cathy · Dareth · Ed · Edna · First Spinjitzu Master · First Mate · Fred Finley · Gayle Gossip · Gene · Genn · Hibiki · Lou · Mistaké · Night Watchman · Noonan · O'Doyle · Patty Keys · No-Eyed Pete · Postman · Rufus Macallister · Warden Noble · Sally · Simon · Captain Soto · Tommy · Tour Bus Driver · Phantom Ninja · Rachel Sparrow · Suzie Wheeler · Master Yang