Scientific botanical illustration of a luminous jellyfish comb (Ctenophora) showing complete bioluminescent comb row architecture, iridescent ctene plate arrangement,tentacle coil distribution, and transparent gut cavity visibility on aged cream paper, handwritten Latin annotations describing each chemiluminescence adaptation and marine drift mechanism, measurement scale in centimeters along the edge, soft deep-sea spotlight from above casting ethereal blue-green shadows, museum archive quality, Pantone-accurate crystalline transparency with rainbow iridescent refractions and pale rose tentacle highlights, composition dynamically floating to showcase the gelatinous invertebrate's 600-million-year-old ctenophore elegance, mood: marine precision capturing oceanic bioluminescent wonder, hyperrealistic details of ctene platelet refraction and photophore distribution patterns visible