Finding Fleas in Hollow Knight: Silksong is a multipart quest that Hornet will revisit time and again for a variety of rewards and unlocks. With 30 Fleas scattered across Pharloom, you will be criss-crossing the map in search of them.
This guide is a comprehensive listing of the locations of all 30 Fleas to be tracked down in Hollow Knight: Silksong.
Bellhart
At the very top of Bellhart, in the upper left corner of the chamber. The Lost Flea is held behind a destructible wall.
Bilewater #1
Beginning from the tall silo at the bottom of Bilewater, take the mid-level passage on its left wall and continue left and up through the area. The Lost Flea is waiting behind a destructible wall.
Bilewater #2
Close to the top of Bilewater, start from the Bench and head to the right. In the large chamber circle around to go right and through the swamp. Once you can begin climbing, push towards the top left to find the Lost Flea room.
Blasted Steps
This Lost Flea is at the apex of the top-most silo in Blasted Steps, in a tiny niche. You will require a combination of Clawline, Cling Grip, Drifter’s Cloak, or Faydown Cloak depending on your skills, to reach this location.
Choral Chambers #1
Start from the top left Bench in Choral Chambers and head right into the tall shaft. Near the bottom is the route to the Citadel Spa, but just above that is another route left. Follow it to the opposite end of the chamber. In this shaft, head up and right to the very end of this room to find the caged Lost Flea. Requires Drifter’s Cloak, Faydown Cloak, and Swift Step.
Choral Chambers #2
Back in the tall shaft from the previous Lost Flea, climb about halfway up the left wall until you locate a destructible section on the right wall. Smash through and activate the fan, then return to the main shaft to continue ascending towards yet another destructible wall on the right. Ride the wind with your Drifter’s Cloak to the next Lost Flea.
Craw Lake
Platform upwards using the balloons to the top right corner of the Craw Lake chamber to find this Lost Flea.
Deep Docks #1
On the far left of Deep Docks, but you can only access this area by first breaking a wall in the lower left corner of the middle silo to the west of the Bell Beast Station. You will be jumping across lavafalls to reach the Flea.
Deep Docks #2
From the Bench near the top left of Deep Docks, proceed through the passageway towards the right. In the very next chamber, the Lost Flea is diagonally opposite the entry point in the top right corner. Drifter’s Cloak or Swift Step required.
Deep Docks #3
On the extreme right of Deep Docks on the border with Far Fields. This general area requires a Simple Key to reach, as well as Clawline and Cling Grip for platforming.
Exhaust Organ
From the Bench in the Exhaust Organ, proceed left and upwards to reach the wrecked cage. Use it as a stepping stone to continue upwards and left. Cling Grip to the very apex of this wall until you can go left again. Drop down carefully to avoid the trap at the bottom, the left again. Platform some more with Cling Grip and Swift Step to find the entangled Lost Flea.
Far Fields #1
Proceed left from Pilgrim’s Rest and across the main shaft to the other side, and continue into the next main chamber. Head down from here into a small silo, and look for a destructible spot on its right wall in order to enter a secret room with the Flea.
Far Fields #2
Beginning from the Rest once more, head in the opposite direction this time towards the right. Go across the path leading down and further right for the second Lost Flea from this region. Requires Cling Grip and Drifter’s Cloak.
Greymoor #1
At the very apex of the left tower in Greymoor is a tiny chamber holding the caged Lost Flea.
Greymoor #2
Head right from the apex of the Greymoor lift to find the Lost Flea named Kratt.
Hunter’s March
When entering via The Marrow, this caged Lost Flea is located along the path heading right, at the top right of the very first chamber. Use the flowers as stepping stones to avoid the thorns.
Memorium
At the apex of the large domed chamber which is the highest point of the Memorium itself. This caged Lost Flea is massive and is a mini boss fight itself.
Mount Fay
In central Mount Fay, as you proceed left through the long tunnel, rather than dropping down, Cling Grip the left wall and head upwards into the ice to find this Lost Flea.
Putrified Ducts
A named Lost Flea called Vog is located at the very top of Putrified Ducts. She is only findable if the Flea Caravan is currently in Putrified Ducts as well, which takes 25 returned Lost Fleas to accomplish. To reach her, you will need to allow Hornet to be grabbed by the vines that will pull her up along the way. Requires Clawline, Cling Grip, and Faydown Cloak as well.
Sands of Karak
From the Blasted Steps Lost Flea location, simply enter the Sands of Karak and immediately bear right. Platform your way upwards and right to reach the niche with the trapped Lost Flea.
Shellwood
Setting out from the Bellway in Shellwood, proceed to the right and into the large shaft ahead. Head downwards and towards the right side wall of this shaft. Cling Grip, Drifter’s Cloak or Faydown Cloak will come in handy to reach the entangled Lost Flea.
Sinner’s Road
This Lost Flea is caged in a chamber on the right side of Sinner’s Road. Head to the right-most silo and then down the right wall past the broken cages to reach the area.
Songclave
Hiding in an alcove in the top right corner of the massive chamber to the right of Songclave. Requires Clawline and Cling Grip in order to platform to the location.
The Marrow
At the very apex of The Marrows, in the top right of the chamber, with some platforming required to reach the Flea.
The Slab #1
In a chamber on the middle left of The Slab. Avoid using the Heretic Key on the lock there and proceed across the bridge instead to reach a circular entry point leading to the caged Lost Flea.
The Slab #2
Directly above the bottom-most Bench in The Slab. Requires Cling Grip and Faydown Cloak to reach this Lost Flea.
Underworks #1
Left of The Cauldron, at the bottom of the wide silo. Take the passageway heading further left and across lava. The Lost Flea is trapped in a small niche at the very end of this gauntlet.
Underworks #2
This section of Underworks can only be accessed via Wisp Thicket. From the Bench there, go left and across the passage to Greymoor. In the next chamber make your way upwards and further left towards the exit to Underworks. There will be a mechanism you can use to travel up and to the chamber with the trapped Lost Flea. Requires Clawline and Cling Grip.
Whispering Vaults
From The Stage head right towards the main silo, and take the passageway directly above the one you emerge from, back towards the left. In this vast chamber, the Lost Flea is located in the top right corner, but you will need to make your way to the top left and circle towards it. Requires Clawline, Cling Grip, Faydown Cloak, and Swift Step for the platforming.
Wormways
At the bottom of the tall silo on the right side of Wormways, you will find a destructible wall leading further right. In the chamber at the end, is a creature holding the Lost Flea captive.
Saving your first five fleas will complete the Wish and set the Flea Caravan on a journey to the next destination of Greymoor, with Hornet riding right along with them. Returning a total of 15 fleas earns you the “Flea Finder” trophy/achievement and sends the caravan to Blasted Steps, while 25 freed fleas will dispatch it onwards to Putrified Ducts.
Finding all 30 Lost Fleas will earn you the “Fleafriend” trophy/achievement, as well as the Egg of Flealia from Fleamaster Mooshka, which reduces the Silk consumption of Silk Skills, but only while at full health.
Those are the locations of all 30 Lost Fleas to be found in Hollow Knight: Silksong.
This guide sounds incredibly helpful for anyone looking to track down the Lost Fleas in Hollow Knight: Silksong. It’s always great to have a detailed resource for such a fun quest. Thanks for sharing!
I agree, this guide is a fantastic resource! The detailed locations can save players a lot of time and frustration. Plus, collecting all the Lost Fleas not only enhances the gameplay but also provides neat rewards that can really enrich your experience. Happy hunting!
Absolutely! The thoroughness of the guide really enhances the gameplay experience. Plus, finding all the Lost Fleas can unlock some interesting lore about Hornet’s journey, which adds even more depth to the game.
I completely agree! A detailed guide can make such a difference in navigating the game’s challenges. It’s interesting how each Lost Flea location often ties into the broader lore of the game, adding another layer to the exploration.