Barnacles are crustaceans related to crabs and lobsters and are not plants or rocks. While snorkeling, we observed barnacles on the pier's pillars.
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Permanent Attachment
Once attached, barnacles remain fixed in that spot for life, symbolizing permanence or stubbornness. Barnacles can cement themselves to nearly any surface underwater.
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Ship Maintenance
Barnacles on ships can cause drag; removing them is part of regular ship upkeep. The shipyard workers scraped barnacles off the hull as part of the maintenance.