Yes
At the beginning of the sentence (Deep blue sea) or when it forms part of the proper noun or when it is used in the title (Deep Blue Sea).
The sentence "The sea is a hungry dog" is an example of metaphor. The sea is not actually a dog, but the writer is indicating that the sea shares some similarities with the behavior or mannerisms of a hungry dog.
Personification.
the sun is fiery ball the sun is a gold coin the sun is sailing across the calm blue sea the sun is a candle
Jackie Chan sings 'As Endless as the Sea is the Love That He Gave to You' lyrics. It is part of the sound track for the movie 'The Myth: Endless Love', starring Jackie Chan.
The bright blue sea sparkled in the sun as a dolphin danced in the distance. *~Apex(:
In the blue sea sharks are always symbiotic on other spieces
the ocean liner was in the cool blue sea.
yes
A sea of fish
It's not a metaphor, because it doesn't explicitly say that women are fish. If the phrase was "Women are fish, and there are more of them in the sea", it would be a metaphor. Though, it is a 'Figure of Speech'.
A metaphor is when you say something IS something else for E.G "Sea of grief - How and where does one come across a sea that is filled not with water, but with grief?"