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EnvironmentSunken Sea
Damage30 / 60 Expert Mode / 72 Revengeance Mode / 79 Death Mode / 90 Master Mode / 108 Revengeance Mode Master Mode / 118 Death Mode Master Mode (in Pre-Hardmode)
60 / 120 Expert Mode / 144 Revengeance Mode / 158 Death Mode / 180 Master Mode / 216 Revengeance Mode Master Mode / 237 Death Mode Master Mode (in Hardmode)
Max Life150 / 300 Expert Mode / 450 Master Mode (in Pre-Hardmode)
300 / 600 Expert Mode / 900 Master Mode (in Hardmode)
Defense9999 (when passive)
6 (when aggressive in Pre-Hardmode)
15 (when aggressive in Hardmode)
KB Resist95% / 95.5% Expert Mode / 96% Master Mode
Immune toEutrophication
BannerClam BannerClam Banner
Cold Bestiary Cold.png-
Water Bestiary Water.pngResistant
Sickness Bestiary Sickness.pngVulnerable
Electricity Bestiary Electricity.pngVulnerable
Heat Bestiary Heat.pngResistant

Clams are Pre-Hardmode enemies that spawn in the Sunken Sea. They are initially passive but become hostile after taking three hits. While hostile, they chase the player by making short leaps towards them.

If the Giant Clam is hostile, the spawn rate of Clams is drastically increased via the Clamity debuff, which causes them to become instantly aggressive as well. The Giant Clam also occasionally spawns three Clams while hostile.

Clams receive a boost to their stats when the world enters Hardmode.


  • Clams do not deal contact damage while they are passive.
  • Minions will not target passive Clams unless they have been hit by another weapon.
  • Damage taken from debuffs does not count as damage taken towards making them hostile.
  • If a Clam is outside of water (either led outside of water or summoned by the Giant Clam outside of water), it will move faster.


  • The BestiaryBestiary entry for the Clam: "Clams once lived in the upper portion of the Ilmeran Sea before the Incineration, being forced to relocate after the battle. Though it was thanks in part to their adaptability and hardiness that their species survived, luck was also certainly on their side."


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
    • Now has 25% less health and 10% less damage in Master Mode.
    • No longer deals 20% Revengeance Mode / 32% Death Mode more damage.
  • Can now drop Pink Pearls, Black Pearls and White Pearls.
  • Now vulnerable to electricity and sickness debuffs, but resistant to water and heat debuffs.
  • Nerfed damage from 30 / 60 Expert Mode / 75 Revengeance Mode / 86 Death Mode to 30 / 60 Expert Mode / 72 Revengeance Mode / 79 Death Mode.
    • Now has 25% damage reduction.
    • Now drops 8-12 Navystone.
  • Can now spawn if the player has the Clamity debuff.