My Fishing Brainrots Fish Index Guide (2026)
What is the Fish Index?
The Fish Index is a collection system that tracks every unique fish type your brainrots catch. It's the secret progression system most players miss. Every fish your brainrots catch gets logged automatically.
Why it matters: When you complete index entries, you unlock permanent cash multipliers. These bonuses survive rebirth and stack with everything else. This is why you want diverse brainrots catching different fish types, not just raw income.
Fish Index Rewards
Complete Fish Index entries for permanent cash multipliers:
| Fish Collected | Bonus |
|---|---|
| 10 types | +10% cash |
| 25 types | +25% cash |
| 50 types | +50% cash |
| 100 types | +100% cash (2x multiplier) |
⚡ These bonuses are PERMANENT. They survive rebirth. Better than any code reward.
How Fish Are Caught
Fish Rarity Tiers
- Common fish: Caught by all brainrots, especially Commons and Uncommons
- Rare fish: More likely from Rare+ brainrots
- Epic fish: Primarily from Epic and Legendary brainrots
- Legendary fish: Only from Legendary and Mythic brainrots
- Mythic fish: Exclusive to Mythic brainrots
Fishing Luck Impact
Upgrading your Fishing Luck increases the chance of catching rarer fish. Higher luck = more diverse catches = faster index completion.
Filling Your Index Fast
Diversity Over Power
Don't just chase the highest income brainrots. Different brainrots catch different fish types. A diverse team fills your index faster than a team of identical Legendaries.
Keep at least one of each brainrot type you hatch, even if it's lower rarity. They might catch unique fish your power team misses.
Keep One of Each Type
Even if you have 5 Legendaries, keep one Epic, one Rare, etc. Different brainrot types have different fish pools. You need variety to complete the index.
Upgrade Fishing Luck
This upgrade directly increases rare fish spawn rates. More rare fish = more unique entries = faster index completion. It's worth prioritizing if you're focused on index completion.
Time-Based Fish
Some fish only appear at certain times or during special events. Check your index regularly to see what you're missing. Event fish often have unique requirements.
Index Completion Strategy
Phase 1: Easy Catches (0-25 fish)
This phase is straightforward. Just play normally with a diverse team. You'll naturally catch most common and uncommon fish.
- Fill all slots with different brainrot types
- Don't worry about optimization yet
- Focus on variety over power
Phase 2: Rare Hunting (25-50 fish)
Now you need Rare+ brainrots to catch the rarer fish. Start prioritizing Epic and Legendary eggs.
- Upgrade Fishing Luck significantly
- Keep a mix of Epic and Legendary brainrots
- Check index regularly to identify missing fish
Phase 3: The Grind (50-75 fish)
This is where it gets tough. You need Legendary and Mythic brainrots to catch the rarest fish.
- Max out Fishing Luck
- Focus on hatching Legendary/Mythic eggs
- Keep diverse Legendary types (not just duplicates)
- Patience is key - rare fish take time
Phase 4: Completion (75-100 fish)
The final stretch. You need Mythic brainrots and possibly event-exclusive fish.
- Mythic brainrots are essential
- Participate in events for exclusive fish
- Some fish may require specific conditions
- The permanent 2x multiplier is worth the grind
Pro Tips
- Check your index regularly - See what you're missing and adjust your team
- Don't delete unique brainrots - Even if they're lower rarity, they might catch fish you need
- Fish Index survives rebirth - Complete as much as possible before rebirthing
- Higher rarity = rarer fish - But diversity still matters more than pure power
- The 100 fish milestone is huge - Permanent 2x cash multiplier changes everything
Why Fish Index Matters
The Fish Index isn't just a collection system. It's your path to permanent power. Those multipliers stack with rebirth bonuses, upgrades, and everything else.
Example: With 50 fish types (+50% cash) and Rebirth 3 (+30% multiplier), you're earning 1.95x base income. With 100 fish types (+100%), that becomes 2.6x. The difference compounds over time.
Don't ignore the Fish Index. It's the difference between slow progression and dominating the game.