Tentacle Spots are a rare item with a 20% drop chance from a killed Tentacle and a 40% chance from a killed Big Tentacle. They can be used to craft the Feather Hat, and Wickerbottom can use them to craft the Book, "On Tentacles". Tentacle Spots do not spoil and can also be burned as fuel in a Campfire or Fire Pit.
- Multiple characters suggest that Tentacle Spots are the genitalia of the Tentacles, supported by Maxwell's quote, "This is how they reproduce", Wickerbottom's quote "Hmmm, reproductive organs", and Wilson's quote, "I think it was its genitalia.". Other character quotes suggest this, but not as notable.