lucifugous

/luːˈsɪfjʊɡəs/
adjective
  1. Avoiding or fleeing from light; preferring darkness.
    • The lucifugous nature of the deep-sea fish keeps it far from the ocean's surface.
    • The lucifugous bat sleeps in caves all day and hunts at night.
    • Gardeners know that some slugs are lucifugous and only appear after sunset.
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