Jump and aim down to lower the camera to see where the crabs are. Alternatively use a Power Bomb to kill them or risk tanking a hit.

Requires:

{
  "or": [
    "canCameraManip",
    "h_canUsePowerBombs",
    {
      "enemyDamage": {
        "enemy": "Sciser",
        "type": "contact",
        "hits": 1
      }
    }
  ]
}