It is possible to place a Power Bomb on the ledge above to kill the crab before going down and into the tunnel.

Entrance condition:

"comeInWithGMode": {
  "mode": "any",
  "morphed": true
}

Requires:

"canCameraManip",
{"or": [
  "Morph",
  "h_artificialMorphSpringBall",
  {"and": [
    "canComplexGMode",
    "h_artificialMorphPowerBomb"
  ]},
  {"and": [
    "Gravity",
    "h_artificialMorphLongIBJ"
  ]},
  {"and": [
    "Gravity",
    "h_artificialMorphBombHorizontally"
  ]},
  {"and": [
    {"enemyDamage": {"enemy": "Sciser", "type": "contact", "hits": 1}},
    {"or": [
      "h_EverestMorphTunnelExpanded",
      {"enemyDamage": {"enemy": "Sciser", "type": "contact", "hits": 1}}
    ]}
  ]}
]}