0002047455 2026-05-13 2026-05-13 0002047455 CIK0002047455:UnitsEachConsistingOfOneOrdinaryShareAndOneRightMember 2026-05-13 2026-05-13 0002047455 CIK0002047455:OrdinaryShares00001ParValueMember 2026-05-13 2026-05-13 0002047455 CIK0002047455:RightsEachRightEntitlingHolderToReceiveOnefifthOfOneOrdinaryShareMember 2026-05-13 2026-05-13 false 0002047455 8-K 2026-05-13 Quartzsea Acquisition Corporation E9 000-00000 00-0000000 1185 Avenue of the Americas Suite 304 New York NY 10036 (212) 612-1400 true false false false Units, each consisting of one ordinary share and one right QSEAU NASDAQ Ordinary Shares, $0.0001 par value QSEA NASDAQ Rights, each right entitling the holder to receive one-fifth of one ordinary share QSEAR NASDAQ true false