Jellyfish are enemies found in water. When underwater, they attack by propelling themselves towards the player in short bursts. When outside of water, they will be unable to move or pursue the player in any way. Jellyfish are able to jump out of the water to attack players, often leaving them stranded on land. Most varieties of Jellyfish produce light, making them easy to spot in dark areas. There are currently 5 Jellyfish variants, 3 of which only appear during Hardmode. Blue Jellyfish only spawn in pre-Hardmode and are replaced by the Green variant in Hardmode.

In Expert Mode, Jellyfish will periodically become electrified, making them invincible for the duration of the attack. If the player attacks a Jellyfish with a sword while it is electrified (or any other swung item that deals direct damage, such as most tools), the player will be hurt. A Jellyfish will constantly maintain its speed while electrified unless it comes into contact with a wall or the water's surface.

Variants[]

Pre-Hardmode[]

Blue Jellyfish

Electrified state

 Classic

 Expert

 Master

Statistics

Type	Aquatic
Environment	Underground Cavern
AI Type	Jellyfish AI
Damage	25/50›90/75›135
Max Life	34/68›148/102›222
Defense	4/4›8
KB Resist	0%/10%/20%
Banner	Blue Jellyfish Banner
Immune to

Drops

Coins	1Pre-Hardmode: 250Hardmode: 4

• Item (Quantity)Rate
• Glowstick (1-4)
  100%
• Jellyfish Necklace
  1%
• Blue Jellyfish Kite(on Windy Days)
  2%

Sounds

Hurt
Killed
Idle (wet)

• Internal NPC ID: 63

Pink Jellyfish

Electrified state

 Classic

 Expert

 Master

Statistics

Type	Aquatic
Environment	Ocean
AI Type	Jellyfish AI
Damage	30/60›54/90›81
Max Life	70/140›154/210›231
Defense	6
KB Resist	0%/10%/20%
Banner	Pink Jellyfish Banner
Immune to

Drops

Coins	1Pre-Hardmode: 250Hardmode: 2

• Item (Quantity)Rate
• Glowstick (1-4)
  100%
• Jellyfish Necklace
  1%
• Pink Jellyfish Kite(on Windy Days)
  2%

Sounds

Hurt
Killed
Idle (wet)

• Internal NPC ID: 64

Hardmode[]

Green JellyfishHardmode exclusive

Electrified state

 Classic

 Expert

 Master

Statistics

Type	Aquatic
Environment	Underground Cavern
AI Type	Jellyfish AI
Damage	80/160/240
Max Life	120/240/360
Defense	30
KB Resist	0%/10%/20%
Banner	Green Jellyfish Banner
Immune to

Inflicts debuff

Inflicts debuff

Inflicts debuff

Debuff	Silenced
Debuff tooltip	Cannot use items that require mana
Chance	20%
Duration	714 seconds

Drops

Coins	820

• Item (Quantity)Rate
• Glowstick (1-4)
  100%
• Megaphone
  1%2%
• Jellyfish Necklace
  1%

Sounds

Hurt
Killed
Idle (wet)

• Internal NPC ID: 103

Blood JellyHardmode exclusive

Electrified state

 Classic

 Expert

 Master

Statistics

Type	Aquatic
Environment	Underground Crimson Ocean + The Crimson
AI Type	Jellyfish AI
Damage	75/150/225
Max Life	150/300/450
Defense	20
KB Resist	0%/10%/20%
Banner	Blood Jelly Banner
Immune to

Drops

Coins	820

• Item (Quantity)Rate
• Monster Meat
  0.07%

Sounds

Hurt
Killed

• Internal NPC ID: 242

Fungo FishHardmode exclusive

 Classic

 Expert

 Master

Statistics

Type	Aquatic
Environment	Glowing Mushroom biome
AI Type	Jellyfish AI
Damage	90/180/270
Max Life	140/280/420
Defense	20
KB Resist	0%/10%/20%
Banner	Fungo Fish Banner
Immune to

Drops

Coins	1230

Sounds

Hurt
Killed

• Internal NPC ID: 256

Notes[]

• Jellyfish Statues can be Wired to spawn Blue Jellyfish.
• If knocked out of water and onto dry blocks, Jellyfish are rendered immobile until knocked back into water, or water reaches them again. In expert mode, this will also prevent them from becoming electrified.
• Blue and Green Jellyfish are capable of spawning in the Underworld if there is a large enough body of water.
• In Expert Mode, dying from electrocution damage via direct melee contact will not attribute the cause of death to the Jellyfish in the resulting death message. It will be a default message with no cause listed.

Trivia[]

Bestiary entries

• Blue, Pink, and Green Jellyfish: "That strange tingling sensation in the water may be the unwelcome surging of electrical death from a brainless jellyfish. Swim with care."
• Blood Jelly: "Jellyfish swimming in the bloody waters of the Crimson become infected, converting them to its all-consuming cause."
• Fungo Fish: "Some fish exposed to glowing mushroom spores become a curious mushroom-jellyfish hybrid, glowing softly in the watery depths."

History[]

 PC version

• Desktop 1.4.4.1: Fixed a bug that gave an incorrect death message when killed by Jellyfish Shock Attacks.

• Desktop 1.4.4: Expert Electric Shock attack now applies to projectile contact weapons (Spears, Shortswords, Solar Eruption, Sleepy Octopod, Sky Dragon's Fury, and Whips)

• Desktop 1.4.3: Blood Jelly can now drop the Monster Meat.

• Desktop 1.4.0.5: Blue Jellyfish now have a chance to appear in Hardmode, for the sake of Bestiary completion.

• Desktop 1.4.0.3: Fungo Fish sprite updated.

• Desktop 1.4.0.1: Blue and Pink Jellyfish now have a chance to drop their respective kites.

• Desktop 1.3.5: Blue, Pink, and Green Jellyfish sprites updated.

• Desktop 1.3.0.6: Fixed Expert Mode Jellyfish counterattack hitting the player while the player can not hit the Jellyfish.

• Desktop 1.3.0.1:
  • Shock attack introduced.
  • Blue Jellyfish damage increased from 20 to 25, and life from 30 to 34.
  • Green and Pink Jellyfish now drop their own respective banners.

• Desktop 1.2.1: Green Jellyfish can now drop the Megaphone.

• Desktop 1.2.0.3: Blue, Pink, Green variants can now drop Jellyfish Banner.

• Desktop 1.2:
  • Blue, Pink, Green variants can now drop Jellyfish Necklace.
  • Fungo Fish and Blood Jelly introduced.

• Desktop 1.1: Green Jellyfish introduced.

• Desktop 1.0.5: Introduced.

 Console version

• Console-Release: Introduced.

 Mobile version

• Mobile-Release: Introduced.

Nintendo 3DS version

• 3DS-Release: Introduced.