Orange Spodumene

The "Worm Monster" is a corrupted Gem that first appeared in "Bubble Buddies".

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

Abilities

 * Swimming Skills: Since it lives underwater, the Worm Monster is a great swimmer.
 * Subterranean "Swimming": Its ability to swim is not limited in a liquid medium, it also has the ability to burrow and can move at high speeds underground.
 * Enhanced Roar: It has roars so loud that it 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 it is able to stretch around the pillars of a pier multiple times, before reaching its limit.
 * Red Light Perception: Although the monster has no eyes, it has the ability to detect red light allowing it to find its favorite food, fluorescent red seaweed as well as Connie's scarlet glow bracelet without bumping into anything while on land.

"Bubble Buddies"
The Worm Monster was first seen at the bottom of the ocean, eating glowing seaweed. It possessed 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 shore. Steven notices the creature is highly 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, it then explodes and Garnet bubbles its gemstone.

Trivia

 * It was revealed in the episode, "Ocean Gem" that the Worm Monster, along with other monsters, are corrupted gems.
 * Though named Worm Monster, it more closely resembles a sea cucumber of the family Synaptidae.
 * The worm monster's gem reappears in the online game, Heap of Trouble.