Slime Rancher Wiki

The softly glowing heralds of starlight.
— the Slimepedia

The Phosphor Slime is a nocturnal slime easily identified by its violet coloration, wings, and soft bright glow. It is one of the most common slimes found at night, but does not spawn during the day.

True to their nocturnal nature, if it is exposed to sunlight for too long they disappear.

Slimepedia Entry

Phosphor slimes come out at night, flying about the moonlit range upon their translucent wings. Phosphor slimes have a luminescent slime core that pulses with a soft glow, making them easy to spot. It's for this reason ranchers sometimes refer to them as 'low stars'.

Rancher Risks:
Phosphor slimes have special needs compared to your typical slime. A phosphor slime and its plorts will quickly vanish if exposed to sunlight, meaning a rancher could quickly lose an entire corral's worth of phosphor slimes if not careful. Ranchers must either vac them up before daybreak or keep phosphor slimes in a place that is perpetually dark, like a cave.

The luminescent compound found within phosphor plorts can produce light for over 100 years, making it an incredibly eco-friendly form of illumination on Earth. Cities across the globe are slowly switching over to phosphor lights, saving trillions of gigawatts of energy daily. Plus if you rub the stuff in your hair, it glows and looks really cool.


  • To safely keep them on The Ranch, they must either be kept in a corral with the Solar Shield upgrade, or be kept in The Grotto where there is no sunlight. If kept in The Grotto, the Solar Shield is not necessary.
  • Phosphor Slimes can fly, and will attempt to fly away through the top of their corral even if it would be detrimental for them to do so. Having the Air Net upgrade on their corrals is necessary.


  • 1.4.0 - Phosphor largos will now disappear in the sun when they are carried outside.
  • 0.6.0 - Fixed a bug where flying phosphor slimes only moved northeast.
  • 0.3.4 - An issue where phosphor slimes could sometimes disappear from the Grotto or corrals with solar shields was fixed.
  • 0.2.5 - A bug causing Phosphor Slimes to think that Solar Shield was in a corral when it wasn't was fixed.
  • 0.2.4 - Fix of a bug causing them to lose wings when Slime Quality was set to Low.
  • Before 0.2.0 - Phosphor Slimes were added.


Phosphor Slimes may be a reference to the real-world material White phosphorus and its tendency to turn into Red phosphorus when exposed to sunlight. Though visually they may be inspired by fireflies and a Will-o'-the-wisp. It also bears some resemblence to Navi, from the Legend of Zelda series.

The Phosphor Slime's Secret Style - Angelic - is based on angels, celestial beings which are commonly depicted in Christian artwork with feathered wings and a halo.


  • Phosphor Slimes are the only slime that appears exclusively at night, and despawn in sunlight.
  • The Slimepedia icon for the Phosphor Slime and Gordo map icon both lack their antennae. The Phosphor Slime in the credits is also missing its antennae.
  • Phosphor Slimes are capable of carrying one other slime with them when they fly.
  • Along with Pink Slimes, they are the only slime that can spawn in every area other than the Nimble Valley.
Docile Pink SlimePhosphor SlimeTabby SlimeHoney SlimePuddle SlimeSaber SlimeHunter SlimeQuantum SlimeTangle SlimeDervish Slime
Harmful Rock SlimeBoom SlimeRad SlimeCrystal SlimeMosaic SlimeFire Slime
Hostile The TarrFeral Slimes
Special Quicksilver SlimeGlitch SlimeGold SlimeGordo Slimes (Party Gordo)Twinkle SlimeLargo SlimesLucky Slime
Behaviors AgitationHungerFearStackingPounce
Scrapped Meteor Slime
Meat Hen HenChickadooRoostroElder HenElder RoostroBriar Hen (Chickadoo)Stony Hen (Chickadoo)Painted Hen (Chickadoo)Chicken Breeding
Fruit PogofruitCuberryMint MangoPhase LemonPrickle PearKookadoba
Veggie CarrotHeart BeetOca OcaOdd OnionSilver ParsnipGilded Ginger (Locations)
Other WaterAshSpicy Tofu
Plots CoopCorralGardenIncineratorPondSilo
Facilities Plort MarketVacpack (Augmented Vacpack)Range ExchangeRanch HouseStarmailDecorizerChime Changer
7Zee Rewards Club Chroma PacksSlime Toys
Decorative EchoesOrnamentsChimes
The Ranch The GrottoThe OvergrowthThe LabThe DocksOgden's RetreatMochi's ManorViktor's Workshop
Wilderness The Dry Reef (Ring Island)The Slime Sea (Moustache Island)The Moss Blanket (Mushroom LakeFeral Path)The Indigo Quarry (Crystal VolcanoAsh Isle)The Ancient RuinsThe Glass DesertThe WildsNimble ValleyThe Slimeulation
The Vaults Ring Island VaultAsh Isle VaultFeral Path Vault
Features CrateWorld MapMap Data NodesWater SpringsWaterSlime KeySlime GateStatic TeleportersSlime StatueFountain (Locations)Ancient WaterOasisSolar AnomaliesDebug SprayBug ReportsRayvians
Nimble Valley projectiles Spark ShotThunderclapStatic ClingerSlooow Field
Gadget Types ExtractorsUtilitiesWarp TechDecorationsCurios
Drill JellystoneSlime FossilStrange DiamondIndigoniumGlass Shard
Apiary Buzz WaxHexacombRoyal JellyWild HoneyPepper Jam
Pump Primordy OilSpiral SteamLava DustDeep BrineSilky Sand
Other Manifold Cube
Treasure Pods The RanchThe Dry ReefThe Moss BlanketThe Indigo QuarryThe Ancient RuinsThe Glass DesertOgden's RetreatThe WildsNimble ValleyThe Slime SeaThe SlimeulationSecret Style Paid DLC Pack
Additional Information
Economy PlortsNewbucks
Characters Beatrix LeBeau (Knocked Out)NPCs (Thora WestViktor HumphriesOgden OrtizMochi MilesBObHobson TwillgersCasey)7Zee Corporation
Game Information Downloadable ContentFAQsGame VersionsUpcoming FeaturesSlimepediaControlsAchievementsLoading Screen TextsGame ModesVR Playground
Events Wiggly Wonderland (2017)Wiggly Wonderland (2018)Wiggly Wonderland (2019)Wiggly Wonderland (2020)Party Weekend
Monomi Park Ian McConvilleNick PopovichConcept ArtSlime Rancher: Original SoundtrackSlime Rancher: Original Soundtrack II + The Casey Sessions
Cut/Removed content Meteor SlimeFive Day RushUnused Features