An　underwater　stable　superhydrophobic　surface　that　displays　a　very　low　affinity　to　water　and　microorganisms　is　urgently　required　in　marine　engineering　and　offshore　constructions.　In　this　study,　we　demonstrated　an　underwater　stable　superhydrophobic　surface　with　pressure　resistance,　chemical　stability,　biocompatibility,　and　biofouling　resistance.　The　surface　demonstrated　superhydrophobicity　under　a　water　pressure　of　13.72　kPa　for　up　to　27　days.　To　examine　the　anti-biofouling　property　of　the　surface,　the　as-prepared　samples　were　submerged　in　a　natural　lake　for　50　days.　The　surface　could　withstand　water　flush　and　biological　attacks　for　more　than　35　days.　The　mechanical　stability　of　the　surface　was　evaluated　by　a　sandpaper　scratching　test.　An　abrasion　length　of　12　m　would　not　decrease　the　water　contact　angle　of　the　surface,　which　is　superior　over　the　state-of-the-art　coatings　based　on　candle　soot　networks.　The　stable　long-lasting　underwater　superhydrophobic　surface　is　of　great　importance　to　marine　applications.　©　2023