OPENING FRAME of the clip, a new version of image 3 with the same children seen from behind (Yan on the LEFT, Kira on the RIGHT, backpacks with cyan lights, purple fins, exactly two dark puck lamps per helmet, beams going forward). No text.
Pull the camera back a little so the WHOLE giant jellyfish is clearly readable ahead of them, exactly the Stygiomedusa of image 1 (left panel): at the top, the huge rounded dark wine-red bell; from under the bell hang EXACTLY FOUR separate broad flat ribbon arms, clearly distinct from each other, hanging straight DOWN like four long curtains, reaching far below the children and out of the bottom of the frame. Each of the four arms is clearly visible: the children's four white beams fall across them so every arm has a lit stripe, and there are dark gaps of water between the arms. The bell and arms have no glow of its own, only the lit patches show colour; the edges fade into black. Pitch-black water at 4000 m, fine dust only inside the beams, no bubbles. Children exactly as on the character card (image 2).
