The entity was a deep-sea marvel, an anomaly for human understanding. Resembling a mind-worm, it was eerily beautiful with bioluminescent patches adorning its elongated, segmented body. Its eyeless form sensed the world in ways alien to land-dwellers. It thrived in the abyssal depths and crushing pressures, a testament to life's adaptability. Encased in a human corpse, it spoke its story through the language of neural pulses and patterns, hauntingly out of place in its terrestrial confines.