Rainbow Days in Heartopia completely change the fishing experience. On these days, the Rainbow Blessing becomes active, which improves your chances of catching higher-quality fish. You also get access to rare fish that either become easier to find or only appear during this special weather event in Heartopia.
Rainbow Days are perfect for leveling up your fishing hobby. If it’s a Rainbow Day in your game, this is your chance to catch high-value fish like the Golden King Crab, Butterfly Koi, Goldfish, and Large Pearl Mussel.
All Bird Locations in Heartopia
Birdwatching is an exciting hobby in Heartopia. Here’s how you can find all the birds on the island.
Heartopia Rainbow Days, Explained
Rainbow Days are more than just a cosmetic weather change. When a rainbow appears in the sky, you receive a Rainbow Blessing. It is visible on the top corner of your minimap. This blessing increases the quantity of items you collect and improves your chances of catching higher-quality fish. These rare fish directly add more Fishing XP and sell for more gold.
It is a good idea to keep an eye on the Weather tab in Heartopia and plan ahead for the Rainbow event to upgrade your fishing hobby quickly. You can check the weather forecast by accessing your in-game watch.
In addition to some exclusive birds and Insects in Heartopia, Rainbow days also introduce some rare fish species. If you’re going fishing on a Rainbow day, these Rainbow-exclusive fish should be your top priority.
How to Catch Rainbow Fish in Heartopia
Since Rainbow weather can last only a few in-game hours, knowing exactly when it starts and ends can help you make the most of it and catch as many Rainbow fish as you can.
Not all Rainbow Fish spawn everywhere. Some are tied to specific lakes like Meadow Lake or Forest Lake, while others require sea fishing voyages. Before the event starts, decide which fish you’re going to prioritize.
For example, if you’re Level 4 and hunting the Butterfly Koi, you should already be standing at Meadow Lake when the rainbow appears. Higher-level players chasing species like Golden King Crab or Swordfish should prepare for sea fishing instead. The sea fishing event can be started by speaking to Bill at the docks once you reach DG Level 7 in the game. You can start this event using 500 Gold, but if you don’t want to spend your in-game gold, just wait for Bill to start the event himself, as he often offers this opportunity to participate for free.
Many Rainbow Fish have specific spawn windows like Dawn, Dusk, Morning, or Afternoon. If Rainbow weather overlaps with the wrong time block, certain species might not appear.
How to Make the Most of the Rainbow Event in Heartopia
The Rainbow Event in Heartopia is a limited but highly rewarding opportunity. Here’s how to make the most of it.
You can use different buffs to increase your chances of catching Rainbow fish successfully. Fish Attractors help pull in higher rarity species more frequently, while Mermaid Perfume allows you to auto-reel catches, speeding up the entire process. To unlock these fishing supplies, you must level up your fishing hobby. Once you reach the required level, these fishing supplies can be purchased from the fishing mentor, Vanya.
Sometimes, Rainbow Days also overlap with rainy days. This way, you get a double opportunity to catch both Rainbow and Rainy-day exclusive fish. Instead of waiting for separate rain events, you can target multiple species in one highly efficient session. One such example of rainy and rainbow day fish are Mussels, which are one of the Otter’s favorite foods.
All Rainbow Fish & Where to Find Them
Here is a table showing all fish exclusive to the Rainbow event in Heartopia, along with their spawn time, required fishing level, and exact locations.
|
Name |
Location |
Spawn Time |
Level Required |
Notes |
|---|---|---|---|---|
|
Butterfly Koi |
Found in Meadow Lake |
All Day |
Level 4 |
Also available in Rainy weather |
|
Mussel |
Found in Suburban Lake |
All Day |
Level 4 |
Also available in Rainy weather |
|
Chum Salmon |
Found in Tranquil River |
All Day |
Level 6 |
Only available during Rainbow Event |
|
Found in Forest Lake |
All Day |
Level 6 |
Only available during Rainbow Event |
|
|
Tub Gurnard |
Found in East Sea |
All Day |
Level 6 |
Only available during Rainbow Event |
|
Blackspot Seabream |
Found in Zephyr Sea |
Dawn | Dusk |
Level 7 |
Also available in Rainy weather |
|
European Eel |
Found in Old Sea |
Dawn | Dusk |
Level 7 |
Only available during Rainbow Event |
|
Mediterranean Killifish |
Found in Suburban Lake |
Afternoon | Dusk | Dawn |
Level 7 |
Also available in Sunny weather |
|
Mottled Sculpin |
Found in Onsen Mountain Lake |
Afternoon | Dusk | Dawn |
Level 7 |
Also available in Rainy weather |
|
Three-Spined Stickleback |
Found in Shallow River |
All Day |
Level 7 |
Also available in Rainy weather |
|
Golden King Crab |
Found in Sea Fishing |
All Day |
Level 8 |
Only available during Rainbow Event |
|
Goldfish |
Found in Meadow Lake |
Morning | Afternoon, Dusk |
Level 8 |
Also available in Rainy weather |
|
King Crab |
Found in Whale Sea |
Morning, Afternoon | Dusk |
Level 9 |
Only available during Rainbow Event |
|
Bluefin Tuna |
Found in Zephyr Sea |
Morning | Afternoon |
Level 9 |
Only available during Rainbow Event |
|
Huchen |
Found in Giantwood River |
All Day |
Level 9 |
Only available during Rainbow Event |
|
Northern Pike |
Found in Suburban Lake |
Dawn | Dusk |
Level 9 |
Also available in Rainy weather |
|
Ocean Sunfish |
Found in East Sea |
Dawn | Morning |
Level 9 |
Also available in Rainy and Sunny weather |
|
Pumpkinseed |
Found in Onsen Mountain Lake |
Morning | Afternoon | Dusk |
Level 9 |
Also available in Sunny weather |
|
Arctic Char |
Found in Forest Lake |
Afternoon | Dusk |
Level 10 |
Also available in Rainy weather |
|
Shortfin Mako Shark |
Found in Sea Fishing |
Morning | Afternoon |
Level 10 |
Only available during Rainbow Event |
|
Smooth Hammerhead |
Found in Old Sea |
Dawn | Dusk |
Level 10 |
Only available during Rainbow Event |
|
Swordfish |
Found in Sea Fishing |
Morning | Afternoon |
Level 10 |
Only available during Rainbow Event |
It’s also important to understand that Rainbow Days don’t replace the normal fish pool. You can still catch all the standard fish that spawn in each lake, river, or sea during regular Sunny or Rainy weather. The rainbow simply adds bonus species and improves overall quality rates, it doesn’t remove existing ones. So, even if you’re not targeting a specific “Rainbow-exclusive” fish, it’s still worth fishing because your usual catches have a higher chance of appearing in better quality tiers.
- Released
-
January 8, 2026
- Developer(s)
-
XD
- Publisher(s)
-
XD
- Number of Players
-
Single-player
- Steam Deck Compatibility
-
Unknown
