HIS voice came to us again. He said, at first, that he saw nothing in the abyss below him. Then he gasped, swayed, and almost lost his balance. We could see the sweat standing out on his brow and neck, soaking his blue shirt. There were things in the abyss, he said in hoarse tones, great shapes that were like blobs of utter blackness, yet which he knew to be alive. From the central masses of their beings he could see them shoot forth incredibly long, filamentine tentacles. They moved themselves forward and backward — horizontally, but could not move vertically, it seemed. They were, he thought, nothing but living shadows.
Robert A.W. Lowndes (THE ABYSS)