Requires 3 tiles of run speed (with no open end) to make it past the overhang above the door. Cross Room jump and aim towards the left side where the fish is. Shooting at it from below can deal damage sooner to get a faster freeze. Hug the frozen fish to gain the extra height needed to climb on top.

Entrance condition:

{
  "comeInJumping": {
    "speedBooster": true,
    "minTiles": 2.4375
  }
}

Requires:

"HiJump"
"canCrossRoomJumpIntoWater"
"canMomentumConservingTurnaround"
"canTrickyUseFrozenEnemies"
"canInsaneJump"
"canDownGrab"
{
  "or": [
    "Wave",
    "Spazer",
    "Plasma"
  ]
}