Walkthrough
Follow Zora’s River north — the Magic Bean salesman waits at the fork, and several Pieces of Heart hinge on riding Cuccos between platforms. At Zora’s Domain, Princess Ruto asks for your help: Jabu-Jabu, the fish god, has swallowed something that’s hurting him, and the only way in is through his open mouth.
Inside Jabu-Jabu’s Belly you run into Ruto almost immediately — she reluctantly tags along for the rest of the dungeon, and you’ll need to keep her safe from Biri and electric Bari. The Boomerang shows up early in a chest; use it to stun enemies at range and retrieve items without wading into electrified water.
⚠️ If Ruto wanders too far from you she can get herself into trouble — keep her close by targeting her with C-up.
Boss — Barinade
Use the Boomerang to sever the four tentacles anchoring Barinade to the ceiling. Once it drops to the floor, slash the exposed core before it climbs back up; repeat until it’s finished.
You get the Zora’s Sapphire Spiritual Stone — with all three Spiritual Stones in hand, it’s time to head back to the Temple of Time.