Orange Spodumene

The Worm Monster is a former corrupted Gem that first appeared in "Bubble Buddies". As of "Change Your Mind", the Worm Monster has been uncorrupted, along with the rest of the Corrupted Gems, when Steven and the Diamonds combined their powers at Rose's Fountain.

Corrupted
As her name suggests, the corrupted Gem takes on the form of a giant worm-like monster. She is relatively long, and the width of her body is nearly equal throughout her entire length with her head enlarged into a spherical shape, where a circular mouth is located at the end. The body is colored light brown with scattered spots in different hues of purple and blue across it. Her entire body is covered in a thick, shiny translucent light blue coating that includes three tentacles near the mouth. The mouth is circular with multiple rows of white teeth present, each tooth in a circular arrangement in each row. She has a red gem located inside her mouth that gives off a red glow that passes through the skin and coating, creating the illusion of eyes on the head.

Uncorrupted
In her uncorrupted form, the Worm Monster Gem has light brown coloring and still has her translucent shiny light blue coating. Part of her coating acts as her arms, as well as her hair as it goes up into a ponytail. She has one large eye with a blue iris and sharp, pointed teeth. Her gemstone is no longer inside her mouth and now seems to be present inside her chest, a gem placement previously unseen in non-corrupted Gems.

4,500 Years Ago
At the end of the Rebellion, the Worm Monster was unable to escape the Corrupting Light and became corrupted. Afterwards, she resided in Earth's oceans.

"Bubble Buddies"
The Worm Monster is first seen at the bottom of the ocean, eating glowing seaweed. She possesses a habit of burrowing into the ocean floor, resulting in frequent tremors and loud screeching to erupt throughout Beach City.

After falling to the bottom of the ocean, Steven and Connie see the Worm Monster for the first time. The creature then dives into the ocean floor, causing the ground to shake and crack open, making Steven and Connie fall into a pit. The monster reappears after Connie and Steven reach the surface of the ocean and chases them to the shore. Steven notices the creature is attracted to Connie's bracelet because it glows. Grabbing it, he leads the monster around the pier supports, causing them to break and crush the Worm Monster beneath the pier, she then explodes and Garnet bubbles her gemstone.

"Ocean Gem"
She is seen in the flashback as Pearl explained about the corrupted Gems.

"Catch and Release"
Her gemstone can be seen in the Burning Room, still in her bubble.

"Change Your Mind"
She is first seen still bubbled in the Burning Room, before being taken by the Crystal Gems to Rose's Fountain where Steven and Blue Diamond had planned on bathing in the waters of the fountain alongside Yellow and White to cleanse the Corruption from the affected Gems. The Worm Monster was the third Gem shown to become uncorrupted just a few seconds after the Water Bear and the Crab Gem Monster, blushing with joy and happiness as her freedom was restored to her, which prompted Nephrite's Crew to go and join her in bathing in the Fountain. She would later be seen alongside the now-uncorrupted Watermelon Tourmaline and the Heaven and Earth Beetles laughing.

Corrupted

 * Swimming Skills: Since she lives underwater, the Worm Monster is a great swimmer.
 * Subterranean "Swimming": Her ability to swim is not limited in a liquid medium, she can also burrow and can move at high speeds underground.
 * Enhanced Roar: She has roars so loud that they can cause disturbances on land ranging from mild tremors to being able to break off parts of structures.
 * Enhanced Resistance: The Worm Monster's body also has great tensile strength as she can stretch around the pillars of a pier multiple times, before reaching her limit.
 * Red Light Perception: Although the monster has no eyes, she can detect red light allowing her to find her favorite food, fluorescent red seaweed, as well as Connie's scarlet glow bracelet without bumping into anything while on land.

Trivia

 * It is revealed in the episode, "Ocean Gem" that the Worm Monster, along with other monsters, are corrupted Gems.
 * The worm monster's gem reappears in the online game, "Heap of Trouble".
 * Small blue heads of this creature appear in "Gem Bound".

Gemstone
Worm Monster Wielki Robak pt-br:Verme Monstruoso Червь