the Aegean (Sea) /iːˈʤiːən/ el (Mar) Egeo: Following an 1841 expedition to the Aegean Sea, Forbes proposed that the fauna of the oceans could be divided into zones by depth.
the Ionian Sea /aɪˈəʊniən/ el Mar Jónico: Away from the prying eyes of the world, the newlyweds sailed the Aegean and Ionian Seas and on through the Suez Canal.
the Irish Sea el Mar de Irlanda: She had relatives across the Irish Sea.
the Mediterranean (Sea) /ˌmedɪtərˈeɪniən/ el (Mar) Mediterráneo: a beautiful sun-drenched location in the Mediterranean ^ The ancient civilizations explored the Mediterranean.
the North Sea el Mar del Norte: Most of the apprentices are now working on BP installations in the North Sea. ^ the North Sea's oil and gas fields
the Philippine Sea /ˈfɪlɪpiːn/ el Mar de Filipinas: We watched the sunset over the silvery-blue waters of the Philippine Sea.
the Red Sea el Mar Rojo: According to the Bible, Moses parted the Red Sea.
the Tyrrhenian Sea /tɪˈriːniən/ el Mar Tirreno: In the remote distance, the afternoon sun was descending toward the blue Gulf of Naples and the Tyrrhenian Sea.
IDIOMS
a sea change un cambio radical: All this makes for a sea change in our lives.
a sea dog (informal) un lobo de mar: My uncle Peter was known as a real sea dog.
between the devil and the deep blue sea entre la espada y la pared: He had got to the point where he was caught between the devil and the deep blue sea.
on the high seas en alta mar: I'm sure you'd be far more at home somewhere on the high seas with a scarf around your head and a cutlass at your belt.
the briny (British English, informal or old-fashioned) el mar
the deep (literary) el mar, el piélago: the mysteries of the deep
be all/completely at sea estar perdido,-da: They still seemed financially all at sea. ^ It was my first day in the new job and I was completely at sea.
find your sea legs acostumbrarte al movimiento de un barco (sin marearte): Between night and morning I'd found my sea legs, and I felt I was astride the ship, riding her. ^ Still feeling sick? You should have found your sea legs by now.
go to sea hacerse marinero,-ra, echarse a la mar: When I reached home, my wife made me promise never to go to sea again, and I thought my adventures had come to an end. ^ Men go to sea before they know the unhappiness of that way of life.
sail the seven seas surcar los siete mares: I had the dream of building the greatest pleasure ship ever to sail the seven seas.