Climb to the ledge left of the morph tunnel item. With Ice, carefully and quickly freeze the last crab high enough to use as a platform. With a slow ascent, such as with Spring Ball and Ice, the crab will need to circle the entire room, it is possible to use a Super when it passes the speed blocks to speed this up significantly.

Requires:

"canEnterGMode"
{
  "notable": "G-Mode Overload Speed Blocks then use Global Crab"
}
{
  "obstaclesCleared": [
    "B"
  ]
}
"h_canNavigateUnderwater"
{
  "or": [
    "canGravityJump",
    {
      "and": [
        "Gravity",
        "canWalljump"
      ]
    },
    {
      "and": [
        "Gravity",
        "canTrickyUseFrozenEnemies"
      ]
    },
    {
      "and": [
        "HiJump",
        {
          "or": [
            "canSpringBallJumpMidAir",
            {
              "and": [
                {
                  "notable": "Underwater Walljumps"
                },
                "canUnderwaterWalljump"
              ]
            }
          ]
        }
      ]
    },
    {
      "and": [
        "HiJump",
        "canTrickyUseFrozenEnemies",
        {
          "or": [
            "canCrouchJump",
            "canDownGrab"
          ]
        }
      ]
    },
    {
      "and": [
        "h_canMaxHeightSpringBallJump",
        "canTrickyUseFrozenEnemies",
        "canBeVeryPatient"
      ]
    }
  ]
}