v3.25.2
Cover - shares
6 Months Ended
May 31, 2025
Jul. 10, 2025
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date May 31, 2025  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --11-30  
Entity File Number 001-42555  
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  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Elected Not To Use the Extended Transition Period false  
Entity Shell Company true  
Entity Common Stock, Shares Outstanding   11,409,900
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, par value $0.0001 per share    
Title of 12(b) Security Ordinary Shares, par value $0.0001 per share  
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