A

• [+] Countries bordering the Arctic Ocean‎ (7 C, 4 P)
• [+] Countries bordering the Atlantic Ocean‎ (42 C, 19 P)

B

• [+] Countries bordering the Baltic Sea‎ (9 C, 9 P)

C

• [+] Caribbean countries‎ (32 C, 8 P)

I

• [+] Countries bordering the Indian Ocean‎ (4 C)
• [+] Countries of the Indian Ocean‎ (18 C, 8 P)

M

• [+] Countries bordering the Mediterranean Sea‎ (1 C, 1 P)
• [+] Countries of the Mediterranean Sea‎ (22 C, 14 P)

P

• [+] Countries bordering the Pacific Ocean‎ (22 C, 10 P)
• [+] Countries bordering the Philippine Sea‎ (6 C, 3 P)

R

• [+] Countries bordering the Red Sea‎ (8 C, 2 P)

S

• [+] Countries bordering the South China Sea‎ (10 C, 5 P)