Cthulhu

was originally devised by author, as an evil god from beyond the human universe. The creature remains a popular element of today.

While Cthulhu itself never made an appearance, a number of enemies and items in Terraria include direct and indirect references to Cthulhu.

Bosses

 * – One of the first bosses that will be faced by the player. According to the official game lore, it is one of the organs ripped out from Cthulhu when he was defeated.
 * – The pre-Hardmode boss of The Crimson.
 * – The pre-Hardmode boss that guards the entrance to the Dungeon.
 * – The final boss in the game. It resembles common depictions of Cthulhu.
 * – The final boss in the game. It resembles common depictions of Cthulhu.

Bosses' servants

 * – A minion summoned by the Eye of Cthulhu.
 * – An invincible enemy summoned by Moon Lord.
 * – A minion summoned by the Lunatic Cultist. It resembles Cthulhu's head and is also reminiscent of the head of Moon Lord.

Items

 * – A post-Plantera yoyo dropped by Mothron during a Solar Eclipse, referencing the namesake boss.
 * – An Expert Mode-exclusive item dropped by the Eye of Cthulhu.
 * – A quest item for the Angler. It resembles a Demon Eye.

Miscellaneous

 * – A larger version of the Sharknado summoned by Duke Fishron. In Lovecraftian mythos, Cthulhu is often depicted as living in the deep ocean. Besides this, it is mostly irrelevant to Cthulhu himself, save for the name.

Trivia

 * In the concept art, he is missing one of his eyes, presumably because the missing eye became the Eye of Cthulhu boss.
 * One of the title messages on the refers to this: ""

克苏鲁