There are many seas in the world. To name three seas is easy, there is the Adriatic Sea, the Coral Sea and the Sea of Japan.
suez canal and panama canal
The Caspian sea does not have connection to the World Ocean, so it is not real sea (like Black sea, that ultimately connected to the Atlantic ocean via the Mediterranen sea). The Caspian Sea is linked by canals to the Black Sea and via the Volga River and canals to the Baltic.
Some canals open to the sea, the Panama Canal opens to the Pacific Ocean on one end and the Atlantic on the other end.
Red sea, Black sea, and Yellow sea
Three seas that surround the Philippines include: Celebes Sea South China Sea Arafura Sea
dolphins sea cucumbers and hammer head sharks
The Caribbean sea
The Caribbean sea
Sea Lampreys got to the U.S. by shipping canals which connected the great lakes to oceans.
The Black Sea
Canals were built for transport and for boats to go on them. Canals exist in many parts of the world; some of the most important are the Suez Canal, at the eastern tip of the Mediterranean (cutting through the Sinai desert) and the Panama Canal, in Central America. Canals are built to enable ships and boats to travel from one body of water to another. In the case of the Suez Canal, the Mediterranean is connected to the Red Sea leading to the Arabian Sea, and in the case of the Panama Canal, the Atlantic Ocean is connected to the Pacific Ocean. Canals make it possible for ships to get to their destinations faster and more efficiently.