Crossword clues for On the ___ (at sea):SEAMelville settingSEAOctopus's garden?SEAWith 34-Across, sunken treasure's spotSEAMediterranean or BalticSEASBering and BlackSEAPirate's realmSEAColossal numberSEABoardwalk viewSEAWaves home?SEAWhole slewSEASSinbad's septetSEABig wet spotSEASVast expansesSEANereid's homeSEALast word of "America the Beautiful"SEADeep blueSEAEnchantment Under the ___ Dance (setting for the climax of "Back to the Future")SEALarge wet bodySEAMoby Dick settingSEABig wet bodySEAShark tank?SEASwell place?SEAWet bodySEAWhere one can make a splashSEASite of chanteysSEASSouth China and East China, e.g.SEAWith 5-Down, Washington portSEA___-Tac AirportSEAMidnight zone bodySEASThey may be roughSEASargasso, for oneSEAWhat mare meansSEARooms by the ___ (Edward Hopper painting)SEASThey're sometimes roughSEABig blue expanseSEANemo's homeSEABlack or Yellow, e.g.SEAIt can float your boatSEABathysphere's placeSEAWhere buoy meets gullSEAWhere the buoys areSEAIn the Aeroplane over the ___ (Neutral Milk Hotel magnum opus)SEASBlack and BalticSEAGigantic quantitySEAMare, on the moonSEAMetaphor for a freelancer's workload, oftenSEAUrchin's homeSEASuperabundanceSEA26 Down's milieuSEASMaria on Mars