Radioactive Carp★
A glowing mutant carp from the radioactive mines. Even more mutated than its parent.
Quick answer
Where to catch Radioactive Carp in Stardew Valley
Catch Radioactive Carp at Sewers during Spring, Summer, Fall, Winter from Any in any weather. It sells for 1000g at normal quality and 2000g when smoked; difficulty 95 makes tackle preparation important.
Sewers
Spring, Summer, Fall, Winter
Any, any weather
1000g base, 2000g iridium
530g Roe -> 1060g Aged Roe
Cork Bobber or Trap Bobber
Sell extras; keep one for collection or Fish Pond use
Price decision
Sell, smoke, or use a Fish Pond?
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Sell directly
1000g
Normal quality
Smoke once
2000g
+1000g before Coal and machine time
One pond product
530g Roe → 1060g
Aged Roe; not daily profit
Is Radioactive Carp worth keeping?
Keep Radioactive Carp if it fills a bundle, recipe, gift, Fish Pond, or collection goal.
When to sell or smoke it
Sell or smoke extra Radioactive Carp when you need gold and do not have a specific use for it.
Fish Pond and Roe
530g Roe can become 1060g Aged Roe. Fish Pond output depends on pond population and random daily production rolls. Formula value: 530g Roe, then 1060g Aged Roe.
Fish Pond output depends on pond population and random daily production rolls. The exact max-population output table and first capacity quest are shown below.
Verified 1.6.15 pond rules
Radioactive Carp Fish Pond output
Final daily chances at population 1; each value already includes the pond's 50% base output check and ordered item rolls.
Any item per day
43%
Maximum population
1
Population growth
No reproduction
| Possible item | Quantity | Overall daily chance |
|---|---|---|
| Roe | 1-4 minimum | 43% |
Where & When to Find Radioactive Carp
Location
- Sewers
Found in the sewers after catching the original Mutant Carp. Requires Qi's Extended Family quest.
Time & Conditions
Difficulty & Catching Strategy
Difficulty: 95
ExtremeOne of the hardest fish in the game
Mixed Behavior
Unpredictable movement that alternates between different patterns. Requires adaptability.
Tip: Stay centered and react to changes. Don't commit too heavily to one direction.
Expert Tips for Radioactive Carp
Part of Qi's Extended Family quest. Same location as Mutant Carp (Sewers). Year-round availability.
Recommended Tackle
Cork Bobber
Larger fishing bar
Best for: Hard fish like legendaries
Trap Bobber
Slower catch bar drain
Best for: Difficult fish that move a lot
Tackle requires an Iridium Rod. Purchase from Willy's shop at Fishing Level 6.
Sell Prices by Quality
| Quality | Price |
|---|---|
| Normal | 1000g |
| Silver | 1250g |
| Gold | 1500g |
| Iridium | 2000g |
Smoked Fish Value
The Fish Smoker uses 1 Coal and doubles the fish sell price while preserving quality. Fisher or Angler changes the fish value first; Artisan then increases the smoked product.
| Input Quality | Fish Value | Smoked Value |
|---|---|---|
| Normal | 1,000g | 2,000g |
| Silver | 1,250g | 2,500g |
| Gold | 1,500g | 3,000g |
| Iridium | 2,000g | 4,000g |
Formula: fish sell price x 2. See the formula audit for source notes.
Uses for Radioactive Carp
- Legendary II fish
- Qi's Extended Family quest
- Trophy fish
Did You Know?
Its radioactive glow suggests even more mutation than its already-mutant parent.