Fisch Cthulhu Boss Guide – How to Find & Defeat, Location

Cthulhu is one of the hardest bosses in Fisch (Cursed Seas Update), and defeating him is required to unlock Second Sea. However, his location is well hidden, and his multi-phase fight makes him a tough challenge.

This Fisch Cthulhu Boss Guide – How to Find & Defeat, Location guide will cover Cthulhu Boss’s location, how to start the fight, battle mechanics, and the best strategies to defeat him.

Where to Find the Cthulhu Boss in Fisch

Cthulhu Boss Location – Terrapin Island

The Cthulhu Boss is located on Terrapin Island, near the Sea Traveler NPC.

Exact Coordinates:

📍 (140, 150, 2030)

To reach Terrapin Island:

1. Use a Boat – You can sail manually or use a fast-travel option if available.

2. Check the Map – The island is east of the main hub in First Sea.

3. Look for the Sea Traveler NPC – He is standing near a mysterious stone door.

How to Enter Cthulhu’s Lair

Once you arrive at Terrapin Island, follow these steps to access the Cthulhu Boss Fight:

1. Find the Stone Door – Located next to the Sea Traveler NPC.

2. Trigger the Cutscene – Enter the door, and a cutscene will play, showing cultists worshipping Cthulhu.

3. Stand in the Ritual Circle – After the cutscene, step into the center of the circle inside the lair.

4. Wait for 2 Minutes – The ritual will begin, and you must wait inside the circle for exactly 2 minutes.

5. Fight Begins! – After the timer ends, Cthulhu will awaken, and the boss battle starts.

🔹 Max Players Allowed: 5
🔹 Recommended: Bring a team! Fighting solo is extremely difficult.

How to Defeat Cthulhu Boss in Fisch

The Cthulhu Boss Fight consists of six phases, each requiring different mechanics.

Cthulhu’s Health Bar & Color System

• Cthulhu’s health bar has six colors:
  Red → Orange → Yellow → Green → Blue → Purple

• You can only damage him if your attack matches the current health bar color.

Step-by-Step Battle Guide

Step 1: Use Keeper Altar Torches

Inside the arena, you will find Keeper Altars with torches. These torches allow you to damage Cthulhu.

Step 2: Match Torch Color to Health Bar

• At the start, your torch will be Red, allowing you to damage Cthulhu while his health bar is Red.

• As you deplete his health, the bar changes color. You must change your torch color accordingly.

Step 3: Changing Torch Color via Obby (Obstacle Course)

• Each torch color change requires completing a small obby (parkour challenge).

• When the health bar turns Orange, you must:

  1. Find the Orange Platform in the arena.

  2. Complete the obby challenge leading to the Orange Keeper Altar.

  3. Use the torch on the altar to turn it Orange.

  4. Return and continue attacking Cthulhu.

Repeat this process for all six colors as the fight progresses.