Already their telescopes enabled them to make out enormous moving shapes, black and grey-brown and pale red, swimming about, evidently by their own volition, rising and falling and often sinking down on to the gigantic vegetation which covered the surface, possibly for the purpose of feeding.

But it was also evident that they resembled the inhabitants of earthly oceans in another respect, since it was easy to see that they preyed upon each other.
"I don't like the look of those creatures at all," said Zaidie, when the _Astronef_ had come to a stop and was floating about ten miles above the surface.

"They're altogether too uncanny.

They look to me something like jelly-fish about the size of whales, only they have eyes and mouths.

Did you ever see such awful-looking eyes, bigger than soup-plates and as bright as a cat's.