Fishing is one of the most relaxing and rewarding hobbies in Heartopia. When you unlock your fishing rod during the tutorial, you get the chance to explore the island’s lakes and rivers. While some fish are easy to catch, others have certain spawning conditions. One of the rarer fish in Heartopia is the Large Pearl Mussel. If you’ve been struggling to find this fish, this guide will help.
How to Catch the Seahorse in Heartopia
Here’s how you can successfully catch a Seahore and add it to your collection in Heartopia.
Where to Find Large Pearl Mussel in Heartopia
The Large Pearl Mussel becomes available when you reach Fishing Level 6. As such, it can only be caught by more experienced players who have spent some time improving their skills. The Large Pearl Mussel can be caught all day, but it only appears during Rainbow weather, so make sure to check the in-game weather system before heading out.
Here are the exact spawn conditions for the Large Pearl Mussel:Location: Forest Lake
- Time of Day: All Day
- Weather Conditions: Rainbow
- Level Required: Level 6
The Large Pearl Mussel can be found in a specific spot in Forest Lake. Make sure to check the smaller, shallower section of the lake. This is the best place to find it, although it may take a few attempts before it finally bites.
Since it’s a rare find, catching the Large Pearl Mussel takes a lot of patience. It’s a great idea to visit Forest Lake each time there’s a rainbow weather event in Heartopia to increase your chances of finding it. Fishing here with friends can also make the hunt more fun.
How to Catch Large Pearl Mussel in Heartopia
Catching the Large Pearl Mussel follows standard Heartopia fishing mechanics, but timing is key. Look for fish silhouettes in the water and cast your line carefully. It usually takes about 2–3 casts before a Large Pearl Mussel bites.
Upgrading your Fishing Hobby can make the process much easier. Skills like Fish Quality, Fish Playing, and Fish Attractor increase your chances of success and make handling the line smoother, especially when catching rare fish like this one.
The Large Pearl Mussel can be a little stubborn, but with the right preparation, the right spot, and a bit of patience, it’s a satisfying and rewarding addition to your Heartopia Fish collection.
- Released
- January 8, 2026
- Developer(s)
- XD
- Publisher(s)
- XD
- Number of Players
- Single-player
- Steam Deck Compatibility
- Unknown








- Genre(s)
- Life Simulation, Casual, City Builder, Immersive Sim