Seas	Surface covered by Natura 2000 network	Percentage covered by Natura 2000 network
Baltic Sea	45688	12.3
North-east Atlantic Ocean	151041	3.7
Celtic Sea	34836	3.8
Greater North Sea incl. Kattegat & English Channel	88323	17.6
Bay of Biscay and the Iberian Coast	25676	3.2
Macaronesia	2205	0.1
Mediterranean Sea	29331	2.4
Western Mediterranean Sea	19680	3
Ionian Sea and Central Mediterranean Sea	3303	1.4
Adriatic Sea	1525	1.3
Aegean-Levantine Sea	4823	2.5
Black Sea	2875	4.5