Overview[1]
Mustard is a Secret catch in Fisch, found around The Ocean — sells for about 4,750 C$ per kg. In-game bestiary: “A bulbous and rotund yellow pufferfish.”
The Mustard is a Secret fish obtainable in The Ocean. Due to its high rarity, it makes for a challenging catch, moving erratically across the fishing bar. When hooked, a will pop above the player's head, and a shimmering sound is played - as with all Secret fish.
How to get it
Fish it up around: The Ocean. Best bait: Seaweed. Season: Summer. Weather: Rain.
Stats
- Bait
- Seaweed
- Base Chance
- 0.004
- Base Resil
- 45
- Base Value
- 5688
- Base Weight
- 4
- Base XP
- 7,000
- Best bait
- Seaweed
- Location
- The Ocean
- C$ per kg
- 4,750
- Rarity
- Secret
- Season
- Summer
- Sources
- Fishing Rod
- Time of day
- Any
- Weather
- Rain
- Weight Range
- 3
- Xp
- 5690
Catch Quips
caught Mustard! Mustard! Woah! Mustard! MUSTARD!!! Mustard?! A PUFFERFISH?! Augh...
Notes
The Mustard has a base chance of 0.15% (1/666) of being caught, chances are affected by the luck stat and other luck boosts. Aurora Borealis Boost: 1/95 The best rods to get the fish are low-level rods like Fortune Rod, Training Rod, and Flimsy Rod due to their low weight limit. This limit reduces the chances of catching other fish hence increasing the secret fish's chance.
Value
11,875C$
What does this mean?
Fisch's in-game currency. A fish's value is its documented average sell price in C$ — what it sells for at its average weight. A rod's value is its documented shop cost. Both are in-game facts from the community wiki, not a trading consensus. Values are not comparable across games.
Opening baselineRecorded
Source: Fisch Wiki (Fandom) · verified Aug 27, 2026
Patch history
This fish is one of the first 5 Secret fish in the game, and was introduced in update 1.15.0. The Mustard plays the 'Mouse squeak' sound from the game Undertale when used. The Shiny variant of Mustard was made to resemble Not_Nert's old avatar.
