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Special Ability
Emits light
Bioluminescence.png (Bug Net.png, Trawl Net.png)
Spawns from
The Ocean

Perish time
Never spoils
Can be released to emit light
Bioluminescence.png (Bug Net.png)
Stacks up to

Wilson Portrait.png
These make a soothing glow.


Willow Portrait.png
It's a cold light. Not like a flame at all.


Wolfgang Portrait.png
Pretty sea-lights!


Wendy Portrait.png
Life takes such curious forms! Yet death claims them all.


WX-78 Portrait.png


Wickerbottom Portrait.png
Fascinating, beautiful marine biology.


Woodie Portrait.png
Just like the Northern Lights.


Waxwell Portrait.png
Quite otherworldly, no?


Wigfrid Portrait.png
What magic is this?


Webber Portrait.png
Wooow! Pretty water lights!


Walani Portrait.png
Pretty glowy goop!


Warly Portrait.png


Woodlegs Portrait.png
They light up me life.


Bioluminescence is a passive immobile Mob introduced in the Shipwrecked DLC. It is found in Deep Oceans in groups of 12. It can be considered the aquatic version of Fireflies, and emits light during the night. It will not appear until dusk arrives, and will stay until dawn. It does however still persist during a Full Moon. Once found, it can be caught with Trawl Net or Net while it is visible. Unlike Fireflies, it won't disappear when player character approaches, so they can be used as a permanent protection against Charlie.

Bioluminescence can be used to craft Bottle Lanterns, Buoys, and can be used to refuel Bottle Lanterns, Miner Hats as well as Boat Lanterns (restores 38.5% of its capacity). It does not change location so once the map is generated, its location can be marked on the map by placing any items that have a map icon, such as Backpack, Log Raft, Raft or placing a Buoy nearby.

Bioluminescence is currently non-renewable. It has a spawner in the files, but the spawner removes itself after world generation. When dropped on land, bioluminescence is destroyed, but it can be placed in the water safely.

TabTools.png Usage[edit | edit source]

Inventory slot background.pngBioluminescence.pngInventory slot background.pngBioluminescence.pngInventory slot background.png Empty Bottle.pngAlchemy Engine.pngInventory slot background.pngBottle Lantern.png
Inventory slot background.pngBioluminescence.pngInventory slot background.pngBioluminescence.pngInventory slot background.png Empty Bottle.pngInventory slot background.pngBamboo.png


Science Machine.pngInventory slot background.pngBuoy.png

Placeholder.png Trivia[edit | edit source]

  • Bioluminescence typically refers to the production of light by living organisms. Given the appearance and habitat of the Bioluminescence in-game, it appears to be modelled after Dinoflagellates, which are bioluminescent Plankton that can cause water to glow in a phenomenon known as Red Tide.

Mosquito.png Bugs[edit | edit source]

  • Sometimes Bioluminescence does not disappear during the day.
  • Bioluminescence in the inventory will be lost when using Teleportato.