পৃথিবীতে মোটমূল্যে পাঁচটি মহাসাগর রয়েছে, যাদের নাম হল:
১. প্রশান্ত মহাসাগর
২. আটলান্টিক মহাসাগর
৩. ভারত মহাসাগর
৪. সুমেরু মহাসাগর
৫. কুমেরু মহাসাগর।
![৭টি মহাসাগরের নাম কী? - Quora](data:image/jpeg;base64,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)
এই মহাসাগরগুলি পৃথিবীর বৃহত্তম ও প্রায় সমস্ত জলমার্গ পরিচালিত করে এবং মানব জীবনের জন্য গুরুত্বপূর্ণ ভূমিকা পালন করে। এদের মধ্যে প্যাসিফিক মহাসাগর পৃথিবীর সবচেয়ে বড় এবং আগে উল্লেখযোগ্য। এই মহাসাগরগুলি সাধারণত বিশাল আয়তাকার আকৃতির এবং ভারতীয় মহাসাগরের মতো প্রায় পৃথিবীর অধিকাংশ জলাশয় ধারণ করে।