v3.26.1
Cover
May 13, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date May 13, 2026
Entity File Number 000-00000
Entity Registrant Name Quartzsea Acquisition Corporation
Entity Central Index Key 0002047455
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 1185 Avenue of the Americas
Entity Address, Address Line Two Suite 304
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10036
City Area Code (212)
Local Phone Number 612-1400
Written Communications true
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Units, each consisting of one ordinary share and one right  
Title of 12(b) Security Units, each consisting of one ordinary share and one right
Trading Symbol QSEAU
Security Exchange Name NASDAQ
Ordinary Shares, $0.0001 par value  
Title of 12(b) Security Ordinary Shares, $0.0001 par value
Trading Symbol QSEA
Security Exchange Name NASDAQ
Rights, each right entitling the holder to receive one-fifth of one ordinary share  
Title of 12(b) Security Rights, each right entitling the holder to receive one-fifth of one ordinary share
Trading Symbol QSEAR
Security Exchange Name NASDAQ