A "sea change" is a marked or a profound transformation. To read more about this idiom on Answers.com, see the Related Link.
sea
Swarming sea
The Sea Change was created in 1998.
sea horses change color by its surroundings
Sea
The word "submarine" simply means "under the sea". (Sub meaning below, marine meaning sea)
she sells sea shells on the sea shore
encircling boiling copper sea
Sea Change - album - was created on 2002-09-24.
Sea Change - Parker novel - was created in 2006.
lord of sea
star of the sea.