Names of films topics sea?

Names of films topics sea?
'Sea Wolf' (1941).
'Sea Hawk' (1940).
'Sea of Love' (1989).
'Deep Blue Sea' (1999).
'The Deep' (1977).
'Waterworld' (1995).
'The Abyss' (1989).
'The Cruel Sea' (1958).
'The Sea Shall Not Have Them' (1955).