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3 million shipwrecks have become helpful habitats for underwater life worldwide. When a vessel sinks, tiny microbes settle on the wreck, forming a carpet of cells called a biofilm that help make the surface more hospitable for the floating larvae of organisms like sponges and corals to settle and mature. These secondary settlers sometimes appear within minutes of a ship sinking, using it for shelter, resting places during migrations, and more. π¦ πͺΈ| Source: Good Good Good