Map of Seas – World Seas, Marine Regions & Coastal Waters

Map of Seas – World Seas, Marine Regions & Coastal Waters

This map of seas provides an overview of major world seas, coastal marine regions and connected ocean waterways.

Seas are partially enclosed bodies of salt water connected to oceans and are important for ecosystems, climate systems, shipping and global trade.

Quick Answer:

Major seas include the Mediterranean Sea, Caribbean Sea, South China Sea, Arabian Sea, Coral Sea and Baltic Sea.

Interactive Seas Map Explore major seas, coastal waters and marine regions around the world.

Open an interactive world map to explore seas and marine waterways worldwide.

🌐 Open Seas Map
Note: Marine boundaries and geographic naming conventions may vary between mapping systems and international organisations.

What Are Seas?

Seas are large bodies of salt water that are smaller than oceans and are often partly enclosed by land.

  • Connected to oceans — linked to larger marine systems
  • Coastal environments — influence nearby climates and ecosystems
  • Marine biodiversity — support fish, coral reefs and ocean life
  • Shipping routes — important for international trade and transport

Major World Seas

  • Mediterranean Sea — connects Europe, Africa and Asia
  • Caribbean Sea — tropical Atlantic marine region
  • South China Sea — major Asian shipping corridor
  • Arabian Sea — northern Indian Ocean region
  • Coral Sea — located off northeastern Australia
  • Baltic Sea — enclosed northern European sea

Types of Seas

  • Mediterranean seas — largely enclosed by land
  • Marginal seas — partially separated from oceans
  • Inland seas — mostly enclosed water bodies
  • Coastal seas — shallow marine regions near land
  • Tropical seas — warm marine ecosystems

Seas and Environmental Systems

  • Ocean currents — transport heat and nutrients
  • Marine ecosystems — support fisheries and biodiversity
  • Climate influence — affect coastal weather systems
  • Coral reef habitats — found in many tropical seas
  • Sea level changes — linked to climate systems

Marine Science and Monitoring

  • Satellite marine mapping — monitors sea conditions
  • Oceanographic research — studies marine systems
  • Weather and storm tracking — analyses ocean-atmosphere interactions
  • Shipping and navigation systems — support maritime transport
  • Environmental conservation programs — protect marine ecosystems

Why People Search for a Map of Seas

  • To learn world marine geography
  • To study oceans and coastal regions
  • To explore shipping and maritime routes
  • To support geography and science education
  • To understand marine ecosystems and climate systems

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Seas Map Resources

Related Maps & Location Guides

Map of Seas FAQs

  • What is a sea?
    A sea is a large body of salt water smaller than an ocean and often partly enclosed by land.
  • What is the difference between a sea and an ocean?
    Oceans are larger and deeper, while seas are usually connected coastal or enclosed marine regions.
  • What is the largest sea?
    The Philippine Sea is one of the largest seas in the world.
  • Why are seas important?
    Seas support ecosystems, shipping routes, fisheries and climate systems.

This page is for general informational purposes only and is not affiliated with NOAA or any marine authority.

Disclaimer: Marine boundaries, environmental conditions and geographic classifications may vary between scientific and mapping sources. Maps and educational resources are provided for general informational purposes only.