Secret Treasure under the Great Fish

1. Sidon found an intriguing passage in a book about the Zora royal family: "The great fish. The eternal guardian. A secret treasure awaits just beneath the stony form of its statue. Below the long bridge that reaches for the statue, leave your fears behind. Pass beneath two waterfalls to find your prize." What does it mean? And what is this treasure?
2. "The great fish. The eternal guardian. A secret treasure awaits just beneath the stony form of its statue. Below the long bridge that reaches for the statue, leave your fears behind. Pass beneath two waterfalls to find your prize." You found the Vah Ruta Divine Helm in an underground cavern below Zora's Domain.

Properties Attribute

{
    "Steps": [
        {
            "Name": "Ready",
            "IsMiniGame": false,
            "Participants": [
                {
                    "Schedule": "Work\/Component\/AIScheduleParam\/Zora_RuttaTreasure_Ready_Npc_ZoraB001_ClearShido.game__component__AIScheduleParam.gyml",
                    "ActorName": "Work\/Actor\/Npc_ZoraB001.engine__actor__ActorParam.gyml",
                    "InstanceName": "ClearShido",
                    "IsNotClipping": false
                }
            ],
            "DestinationPoint": [],
            "SheikahCameraTarget": [],
            "ForceProgressGameData": "",
            "IsNotChangeAdventureLog": false
        },
        {
            "Name": "TreasureHunt",
            "IsMiniGame": false,
            "Participants": [
                {
                    "Schedule": "Work\/Component\/AIScheduleParam\/Zora_RuttaTreasure_TreasureHunt_Npc_ZoraB001_ClearShido.game__component__AIScheduleParam.gyml",
                    "ActorName": "Work\/Actor\/Npc_ZoraB001.engine__actor__ActorParam.gyml",
                    "InstanceName": "ClearShido",
                    "IsNotClipping": false
                }
            ],
            "DestinationPoint": [
                {
                    "$type": "game__challenge__DestinationActor",
                    "Actor": "Work\/Actor\/Npc_ZoraB001.engine__actor__ActorParam.gyml",
                    "BlackOutFlag": "MainChallenge_IsGatherSages",
                    "InstanceName": "ClearShido",
                    "AlternativePos": {
                        "X": 3340.97509765625,
                        "Y": 269.57989501953125,
                        "Z": -543.4453735351562
                    }
                }
            ],
            "SheikahCameraTarget": [],
            "ForceProgressGameData": "",
            "IsNotChangeAdventureLog": false
        }
    ],
    "__RowId": "Work\/Challenge\/Zora_RuttaTreasure.game__challenge__Challenge.gyml",
    "SortIndex": 5611,
    "RequestActor": "Work\/Actor\/Npc_ZoraB001.engine__actor__ActorParam.gyml",
    "DependFlagName": "SageOfZora_RuttaTreasureReady",
    "RequestLocation": "Work\/Location\/WhiteZora.game__location__Location.gyml"
}