[CTRL v2.4.2: hyperrealism lock; extreme detail preservation; no stylization; directional keys+spill] a jellyfish pulsing in deep water, shot with specialized underwater housing at 100m depth, the bell showing translucent mesoglea with visible radial canals, bioluminescent organs glowing cyan along the margin, trailing tentacles with individual nematocyst batteries visible, shot with 100mm macro in housing at f/11, pure black background with subject self-illuminated, deep-and-glowing grade, alien grace mood