Can there be figurative language(similie, metaphor, symbols) in a story that is supposed to be a piece of naturalistic fiction?

Yes. In fact, skilled writers of fiction
and nonfiction use figurative language. Dr. King's "I Have a Dream"
speech is riddled with figurative language, and Emerson's essays such as "Self-Reliance"
feature thought-provoking metaphors.

In regards to
Naturalist fiction, Crane's "Open Boat" relies heavily on similes, especially related to
the author's description of the sea. In the story's opening paragraph, Crane uses the
following simile to personify the dangerous sea.

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"The horizon narrowed and widened, and dipped and
rose, and at all times its edge was jagged with waves that seemed thrust
up in points like
rocks."

Similarly,
Naturalist works often include symbols which represent Naturalism's themes of survival
of the fittest and fatalism. Jack London's "To Build a Fire" serves as a good example of
Naturalist symbolism.