Name a living fossil and a gregarious pest.

living fossil is coelacanths. and a gregarious pest is Locusts.

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Maidenhair Tree is living fossil and a gregarious pest is Locusts.

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living fossil-limulus(king crab)

gregarious-locusta(locust)

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Living fossils Example: King Crab, Horseshoe Crabs
Gregarious Pest : Locust
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