A highly detailed portrait of a bioluminescent jellyfish, glowing ethereally in a jar. The jellyfish floats gracefully in a clear glass jar, emitting a soft, otherworldly glow that illuminates its intricate microbiome. The background is dark, emphasizing the luminosity and delicate structures of the jellyfish. The image captures the subtle interplay of light and shadow, highlighting the surreal beauty of this bioluminescent creature in its confined yet mystical environment.