As each green wave rose from the churning water, it illuminated within itself the six- or eight- foot- long bodies of twisting sharks. I would say this conveys a feeling of danger and apprehension as if leading up to a possibility whereby someone could get hurt by the sharks.
In the Metamorphosis, Kafka makes it evident that Gregor endures a hellish existence as a bug. He works hard all the time, doesn't really have any kind of life, besides providing for his family and being very depressed, so when he is turned into a cockroach, his whole life turns upside down.
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"All day he hung round the cove or upon the cliffs with a brass telescope; all evening he sat in a corner of the parlour next the fire and drank rum and water very strong."
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