The Fish Fright 2025 event in FISCH has introduced one of the most mysterious and challenging locations yet — Nessie’s Catacomb. This eerie underwater cavern hides the Skeletal Nessie, a limited and ultra-rare event fish that’s become the ultimate goal for many players. In this guide, you’ll learn exactly how to find Nessie’s Catacomb, unlock its entrance, and catch Skeletal Nessie before the event ends.
1. Head to Crooks Hallow (Event Island)
To start, travel to Crooks Hallow, the main event island for the Fish Fright 2025 update.
This area is filled with Halloween-themed activities, spooky NPCs, and special event fish — but the real treasure lies deeper within: Nessie’s Catacomb.
You can reach Crooks Hallow by following the event marker from the spawn dock or by selecting it through the event travel system (if you’ve unlocked it).
2. Locate Nessie’s Catacomb
Once you arrive on Crooks Hallow, start exploring the darker, mist-covered areas of the island. The entrance to Nessie’s Catacomb can be found near the rocky cliffs on the northern side, tucked behind thick vines and moss.
The door itself looks like an ancient stone gate covered in glowing runes — but you won’t be able to walk in right away. It’s magically sealed and requires something special to open.
3. Obtain the Baby Nessie (Your Key Inside)
You’ll need to have a Baby Nessie in your inventory to unlock the catacomb.
The Baby Nessie is a limited fish available only during the Fish Fright 2025 event, and it serves as the key to the catacomb.
Here’s how to get it:
Fish in Crooks Hallow waters during the event.
Equip your best luck gear or event bait for higher chances.
The Baby Nessie is uncommon, so expect to fish for a while before getting one.
Once you catch it, equip or hold it out in your hands as an item. You’ll notice the catacomb door react when you approach it.
4. Unlock and Enter Nessie’s Catacomb
When you’re holding the Baby Nessie, approach the catacomb gate. The runes will begin to glow brighter, and the stone door will unlock and slide open.
Step inside — you’ve entered Nessie’s Catacomb, one of the most secretive fishing zones in the event.
Inside, the atmosphere changes drastically: glowing bones, ghostly water ripples, and echoes from the depths give the catacomb an otherworldly feeling.
5. Catch the Skeletal Nessie
Now comes the real challenge — catching Skeletal Nessie.
This limited fish is the event’s rarest catch, only found within the catacomb.
Tips for success:
Use a high-tier rod: Anything below Epic may struggle to hook it.
Boost your Luck stat with event potions or accessories.
Fish near the glowing pools or central chamber — these have the highest spawn rate.
Be patient: The Skeletal Nessie has a very low appearance chance.
Once hooked, expect a tough battle. The Skeletal Nessie’s pull pattern is erratic and stronger than most event fish, so focus carefully during the reeling phase.
6. Why You Should Catch It
The Skeletal Nessie isn’t just a trophy fish — it’s a limited event exclusive, meaning it likely won’t return after Fish Fright 2025 ends. Owning one shows that you’ve conquered one of the hardest event challenges, and its value could increase if trading becomes available in future updates.
Don’t leave the catacomb once you’re inside; re-entry still requires the Baby Nessie.
Carry enough bait and durability restorers for long sessions.
Try fishing during nighttime cycles — reports suggest a slightly higher spawn rate then.
Stay alert for other Halloween secrets hidden around Crooks Hallow.