Last updated: 10 July 2026
Silksong Lost Flea Locations — All 30 Fleas Guide
Hollow Knight: Silksong hides 30 Lost Fleas across Pharloom's sprawling regions — some in plain sight, many behind cages, enemy gauntlets, or tricky platforming. Rescuing them drives the Flea Caravan Wish quest, unlocks rewards at set milestones, and leads to a bonus content hub once you find every last one. This guide walks you through how the quest works, where to search, and the tricks that make tracking them all down far less painful.
There are 30 Lost Fleas hidden across Pharloom. Pick up the Wish quest 'The Lost Fleas' from Fleamaster Mooshka in The Marrow, then rescue fleas toward key milestones: 5 moves the Flea Caravan to Greymoor, 15 shifts it to Blasted Steps, 25 sends it to Putrified Ducts, and all 30 earns the Egg of Flealia — a passive that reduces Silk Skill costs when Hornet's HP is full. Fleas appear across more than twenty regions; many are caged or behind platforming challenges. If you talk to the special flea Vog before finding everyone else, she will sell you the remaining locations.
01What Are the Lost Fleas?
Lost Fleas are Silksong's major collectible quest — the spiritual successors to the Lost Grubs from Hollow Knight:
- There are 30 Lost Fleas scattered throughout Pharloom, hidden across more than twenty of the game's regions.
- They belong to the Flea Caravan, a travelling band of small creatures who have lost their way across the kingdom.
- Rescuing fleas triggers Caravan milestone events and ultimately earns a powerful reward for finding all 30.
- The quest is classed as a Wish — Silksong's side-quest system — so it tracks your progress in the Wish menu.
- You do not need all 30 to finish the main story, but completionists and players hunting the Fleafriend achievement will want every last one.
02How to Start: Find Fleamaster Mooshka
The quest begins in The Marrow, one of the earlier areas in Pharloom:
- Seek out Fleamaster Mooshka, the leader of the Flea Caravan, who rests in The Marrow early in the game.
- Speaking to him registers the Wish quest 'The Lost Fleas' in your journal and tells you what you are looking for.
- Once the quest is active, fleas across the map become interactive — approach them and rescue them by talking to them.
- Each rescued flea returns to the Caravan, incrementing your count toward the milestone thresholds.
There is at least one flea already in The Marrow, so you can start your count straight away before pushing deeper into Pharloom.
03Flea Caravan Milestones and Rewards
The Caravan relocates as you rescue more fleas, and each move brings new benefits:
- 5 Fleas: The Caravan moves from The Marrow to Greymoor. Return to Mooshka to collect the first milestone reward.
- 15 Fleas: The Caravan relocates to Blasted Steps, deeper in Pharloom. Seek out Mooshka at the new location for the next reward.
- 25 Fleas: The Caravan travels to its penultimate stop, Putrified Ducts.
- 30 Fleas: Speak to Fleamaster Mooshka in Fleatopia to claim the Egg of Flealia — a passive item that reduces Silk Skill costs when Hornet's HP is full.
Tracking down the Caravan between milestones is worthwhile — the NPCs there offer dialogue and sometimes extra items, and the Caravan's new position often places it near regions you are about to explore.
04Which Regions Have Fleas?
Fleas are spread across virtually every major zone in Pharloom. Confirmed regions include:
- Early areas: The Marrow, Far Fields, Hunter's March, Greymoor, Sinner's Road, Whispering Vaults
- Mid-game areas: Deep Docks, Shellwood, Bilewater, Underworks, The Slab, Sands of Karak, Wormways
- Later areas: Choral Chambers, Blasted Steps, Bellhart, Mount Fay, Songclave, Wisp Thicket, Memorium, Putrified Ducts
No single region holds a large cluster — fleas are deliberately spread thin to push you into exploring everywhere. Check every nook, above-ground platform, and sunken passage in each area rather than beelining for the exit.
05Tips for Tracking Down Hidden Fleas
Many fleas are straightforward to spot but some are deliberately obscure. These habits will speed up the hunt:
- Break cages — a large number of fleas are trapped inside destructible containers rather than sitting in the open. Strike suspicious cages with your Needle.
- Return with new abilities — fleas gated by traversal may only become reachable after earning Swift Step (dash), the Glide ability, or the Grappling Hook. Keep a mental note of blocked spots to revisit.
- Search vertically — Hornet's traversal encourages going above the standard floor route. Many fleas sit on platforms well above the main path.
- Fight your way through encounter rooms — some fleas only appear, or their cage only opens, after you clear all enemies in a room.
- Buy maps from Shakra the cartographer in each region so you can see unexplored edges — fleas often live in pockets just off the main path.
- Check every sub-room — optional side chambers frequently hide a flea alongside other collectibles.
06Vog: The Flea Who Sells You the Rest
One of the 30 fleas is a special NPC named Vog, initially found above the Bellway station in Putrified Ducts:
- Rescuing her counts toward your 30, and she then relocates to the Flea Caravan near the Grand Gate rather than staying in Putrified Ducts.
- If you speak to her at the Caravan before rescuing all other fleas, she will offer to sell you the locations of any fleas you have not yet found — a purchasable hint system for the late stages of the hunt.
- This makes Vog extremely valuable if you are stuck on the last few fleas and cannot pinpoint where they are hiding.
- She relocates to the Caravan as soon as she's rescued, not only after all 30 fleas are found — so you can lean on her hints well before finishing the full set.
If you are missing only a handful of fleas and are stuck, head to the Flea Caravan to buy hints from Vog before spending hours searching blindly.
07After All 30: Flealia Minigames and the Needle Upgrade
Collecting all 30 fleas opens the bonus area Fleatopia:
- Claim the Egg of Flealia from Mooshka — the passive reduces Silk Skill costs when Hornet's HP is full, making it strong on aggressive builds that rarely take damage.
- Fleatopia hosts three minigames: Juggle, Dodge, and Bounce.
- Beating all three earns the third Pale Oil, which unlocks the fourth and final Needle upgrade (there are only three Pale Oils in the game — the first Needle upgrade is free).
- The Fleafriend achievement unlocks as soon as you rescue the last flea.
The Pale Oil reward makes completing the flea hunt worthwhile even for players less interested in completionism — this is the only way to get the third Pale Oil, and with it the fourth and final Needle upgrade.
FAQ
How many fleas are in Silksong?
There are 30 Lost Fleas in total, scattered across more than twenty regions of Pharloom. They are part of the Wish quest 'The Lost Fleas', started by speaking to Fleamaster Mooshka in The Marrow. You only need to find 5 to progress the initial Wish stage, but collecting all 30 unlocks the Egg of Flealia passive, the Fleafriend achievement, and access to the Flealia minigames that reward the third Pale Oil.
Where do I start the Lost Fleas quest in Silksong?
Find Fleamaster Mooshka in The Marrow, one of the earlier regions of Pharloom. Talking to him registers the Wish quest 'The Lost Fleas' in your journal. There is at least one flea already in The Marrow area, so you can start your count straight away before heading into deeper regions.
What are the flea milestones in Silksong?
Finding 5 fleas moves the Flea Caravan from The Marrow to Greymoor. At 15 fleas it relocates to Blasted Steps, at 25 it moves to Putrified Ducts, and collecting all 30 lets you claim the Egg of Flealia from Fleamaster Mooshka in Fleatopia — a passive that reduces Silk Skill costs when Hornet's HP is full.
What is the reward for finding all fleas in Silksong?
Collecting all 30 Lost Fleas rewards the Egg of Flealia, a passive that reduces Silk Skill costs when Hornet's HP is full. Fleatopia also opens three minigames — Juggle, Dodge, and Bounce — and completing all three earns the third Pale Oil, which unlocks the fourth and final Needle upgrade. The Fleafriend achievement also unlocks when you rescue the last flea.
What does Vog do in Silksong?
Vog is one of the 30 Lost Fleas, initially found in Putrified Ducts. Once you rescue her, she relocates to the Flea Caravan near the Grand Gate. Speak to her there before finding all other fleas and she will sell you the locations of any remaining fleas you have not yet rescued — a purchasable hint system for the late stages of the hunt. She's available as a hint-seller as soon as she's rescued, not only after all 30 fleas are found.
Where are the hidden fleas in Silksong?
Fleas are spread across more than twenty regions, from early areas like The Marrow and Far Fields to late zones like Choral Chambers, Memorium, and Putrified Ducts. Many are trapped inside cages you break with your Needle, some only appear after clearing enemies from a room, and others are gated behind traversal abilities like the dash (Swift Step), Glide, or Grappling Hook. Buy maps from Shakra the cartographer and search above the main floor route — many fleas sit on platforms well above the standard path.
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