Run with enough speed to jump (after the transition) to reach the far left ledge. Either kill or Kago through the Fish enemy. At slightly higher run speeds, Samus can jump from the bottom of the slope and avoid the fish.

Entrance condition:

{
  "comeInRunning": {
    "speedBooster": true,
    "minTiles": 7
  }
}

Requires:

"HiJump"
"canCrossRoomJumpIntoWater"
"canTrickyJump"
"canDodgeWhileShooting"
{
  "or": [
    {
      "ammo": {
        "type": "Super",
        "count": 1
      }
    },
    {
      "and": [
        "Charge",
        "Plasma"
      ]
    },
    {
      "and": [
        "Plasma",
        "canHitbox"
      ]
    },
    {
      "and": [
        "canKago",
        "canLateralMidAirMorph",
        {
          "or": [
            {
              "enemyDamage": {
                "enemy": "Skultera",
                "type": "contact",
                "hits": 1
              }
            },
            "h_pauseAbuseMinimalReserveRefill"
          ]
        }
      ]
    }
  ]
}