The Lost Fleas quest requires you to find five Fleas in Hollow Knight Silksong, and they’re spread all across Pharloom.

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Finding them can be slightly tricky, as they’re all located away from the path you follow to complete the main story. We’ll provide you with all five locations, though, allowing you to track their whereabouts. I have sequenced them in the order I found them, but you can adjust it based on your requirements (and yes, there are more than five).

Table of contents

  • Flea #1 (The Marrow)
  • Flea #2 (Deep Docks)
  • Flea #3 (Deep Docks)
  • Flea #4 (Hunter’s March)
  • Flea #5 (Far Fields)
  • Flea #6 (Greymoor)
  • Lost Fleas Quest rewards

All five lost Flea locations in Hollow Knight Silksong

First, you’ll need to speak with the Fleamaster, who is located in The Marrow. While he tells you about the missing Fleas, he also offers you a bench to rest by the caravan. Let’s take a look at the missing locations of where you can find the five Fleas.

Flea NumberLocationWhere to FindFlea #1The MarrowThe first Flea is located in the upper chambers of the Marrow. Travel upwards from the Fleamaster’s location, and you’ll reach a point where the path breaks. If you go left, you will find Shakra and the route to Mosshome. Go up using the platforms; there is a fair number of enemies along this route, so be careful. Use the platforms on the left before jumping to the right, where you’ll find the missing Flea. Flea #2Deep DocksThis Flea is rather easy to find because it’s along the path of where you unlock the Dash ability. Go left from where you get Dash by platforming and go to the upper parts of the chamber. Flea #3Deep DocksFrom my location, go left and jump over the bug. Break the wall, and you’ll open a chamber filled with lava. Use the platforms to go left and then upwards. There will be a few flying enemies, and you also need to be careful of the lava. Make your way to the right on the highest platform to find your missing Flea. Flea #4Hunter’s MarchIf you have defeated Skarrguard at the entrance, the job will be easier. Go inside, pogo jump on the buds upwards to find the Lost Flea. The track is relatively simple to follow, as you’ll have to keep on the path that keeps going upwards.Flea #5Far FieldsYou’ll have to access the Hidden room in the Far Fields region, located to the extreme right. The room will be blocked by a wall that needs to be broken in order to enter the chamber. You’ll find a Skarr Scout at this location, along with some obnoxious traps. Flea #6Grey MoorIf you have defeated Skarrguard at the entrance, the job will be easier. Go inside, pogo jump on the buds upwards to find the Lost Flea. The track is relatively simple to follow, as you’ll have to keep on the path that keeps going upwards.

For your benefit, I have attached the screenshots of the map locations so that you can reach exactly where you need to be.

Flea #1 (The Marrow)

Screenshot by Destructoid

Flea #2 (Deep Docks)

Screenshot by Destructoid

Flea #3 (Deep Docks)

Screenshot via Team Cherry

Flea #4 (Hunter’s March)

Screenshot by Destructoid

Flea #5 (Far Fields)

Screenshot by Destructoid

Flea #6 (Greymoor)

Screenshot by Destructoid

Lost Fleas Quest rewards

Finding the lost Fleas isn’t without its rewards. Once you retrieve all five, return to Fleamaster. He will offer you the chance to travel with the Caravan, which takes you automatically close to Bellmont. You’ll also get a Flea Brew Offensive charm that will enhance your movement speed and attack speed when consumed.

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