"How can there be a sea out there in space?"

"Oh, that's just my name for it. Most peculiar thing, though. There's a vast, billowy sort of a cloud. Twists and weaves around as if alive. Looks like seaweed or something; and Carr, I swear there are things floating around in it. Wrecks. Something damn peculiar, anyway. I vow I saw a signal. People marooned there or something. Sorta scared me and I didn't stay around for long as there was an awful pull from the mass. Had to use full reversal of the gravity force to get away."

"Now why didn't you tell me that before? That's something to think about. Like the ancient days of ocean-going ships on Earth."

('Vagabonds of Space' by Harl Vincent)

The Nomad lurched and shuddered, drawn ever closer to the horrid mass of the thing. A gigantic jellyfish, that's what it was, a hundred miles across! Carr shivered in disgust as it throbbed anew, sending out those grasping streamers of its mysterious material. As the Nomad plunged to its doom with increasing speed, Mado tried to locate some spot in the universe where an extreme effect could be obtained from the full force of the attracting or repulsive energies. They darted this way and that but always found themselves closer to the milky billows that now were pulsating in seeming eagerness to engulf the new victim...

Carr was at the telescope. Their speed was close to fifteen hundred miles a second. The monstrous mass of Mado's Sargasso Sea loomed close in his vision...

Closer came that mass of whitish jelly. And now it was much larger than before. The terrible creature, for living matter it was, beyond doubt, was growing with the rapidity of a rising flood. Great tentacles of its horrid translucent substance reached in all directions for possible victims. He sickened at the sight. But what a fate for the fleet of the Llotta! If only he could maneuver them into its influence...