Some of the best adventures in Tears of the Kingdom are tucked just beneath the surface—quite literally in this case. The "Secret Treasure Under the Great Fish" side quest takes you deep into the heart of Zora's Domain, swimming through waterfalls and unraveling echoes of the past to unlock a regal reward: the Vah Ruta Divine Helm.

Whether you're here to complete your armor collection or just want to uncover every last mystery in Hyrule, this guide walks you through every step, puzzle, and secret involved.

To unlock this hidden gem, you need to first progress through the regional Zora questline and complete the main story quest titled "Sidon of the Zora." Once that storyline wraps, return to Zora's Domain and speak with Sidon in the throne room . He’ll mention an ancient legend involving a treasure beneath the great fish, triggering the side quest.

This quest is one of several regional phenomena quests and is tied closely to the lore-rich areas of Toto Lake , Ancient Zora Waterworks , and Floating Scales Island .

Step 1: Travel to Zora’s Domain

• Use the Skyview Tower nearest to Zora’s Domain for fast travel.

• Head toward the Great Zora Bridge .

• Once there, scan for the massive fish statue above the Domain—this is your key landmark.

Step 2: Locate the Hidden Cave Entrance

• Stand on the bridge and look directly below the fish statue.

• You'll see a waterfall cascading into a pool.

• Equip the Zora Armor to swim up the waterfall directly.

Tip: If you don’t have the Zora Armor yet, you can get it by completing the "Restoring the Zora Armor" side quest, usually unlocked during the main storyline.

Step 3: Enter the Cave Under the Great Fish

• At the top of the waterfall, you’ll find a small rock ledge with an entrance tucked behind the splash.

• Head inside to reveal the Cave Under Zora’s Domain .

• You’ll spot shaped blocks along the walls and a small puddle leading deeper into the cave.

The interior is dimly lit but straightforward. You won’t need advanced combat or materials—just keen observation and a little swim.

1. Swim forward until you hit a second waterfall .

2. Pass through to enter a chamber with ancient ruins.

3. On the left side , inspect the connected blocks . They seem decorative but hint at the Herodiana side quest puzzle structure.

4. Behind one marble wall , there’s a hidden nook. Use Alohomora -style problem-solving logic (but no spell required!) to inspect corners.

5. Open the chest in the chamber to collect the Vah Ruta Divine Helm .

This helm synergizes with the Zora Armor set and boosts Link’s efficiency in water-based exploration. It’s also a visual nod to the Divine Beast Ruta from Breath of the Wild.

Pair This Quest with Other Side Activities

• Combine with the Sludge-Covered Statue mission to double up rewards.

• Grab Splash Fruit from the riverbanks nearby to prep for future puzzles.

• Use this opportunity to explore the Ancient Zora Waterworks if you haven’t already.

Map Planning

Interestingly, this quest is thematically linked to the Sky Islands . The Zora questline mentions sky phenomena and links to other quests like Clues to the Sky and the Water Temple challenge.

Completing this side quest brings narrative closure to Sidon's arc and wraps up a key thread from Tears of the Kingdom .

In a game overflowing with adventures, the "Secret Treasure Under the Great Fish" stands out as one of the most elegant side quests in Tears of the Kingdom. It doesn't demand combat or grinding—just an eye for detail, and a curiosity to explore every ripple in Hyrule.

Whether you're on a mission to complete the Legend of Zelda: Tears of the Kingdom 100% or just want to wear that shimmering Divine Helm, this quest is a must.

So next time you're passing the Bell Tower Courtyard , remember: there's more beneath the surface than meets the eye.