Current-borne, wave-flung, tugged hugely by the whole might of ocean, the jellyfish drifts in the tidal abyss. The light shines through it, and the dark enters it.
From Ursula Le Guin, The Lathe of Heaven, Ch. 3.
Image attribution: Exhibit case in Hall of Life in the Sea at Museum of Natural History, featuring "Siphonophoran Jellyfish." Smithsonian Libraries and Archives. Link.