at sea
at sea
between the devil and the deep blue sea
in a difficult situation where there are two equally unpleasant or unacceptable choices
go/run away to sea
to become a sailor; to leave your home and family without permission to become a sailor
He ran away to sea at the age of 13.
out to sea
far away from land where the sea is deepest
She fell overboard and was swept out to sea.
She stood on the cliff, staring out to sea.
put (out) to sea
to leave a port or harbour by ship or boat
The ship put to sea in deteriorating weather conditions.
there are plenty more fish in the sea
used to comfort somebody whose romantic relationship has ended by saying that there are many other people with whom they may have a successful relationship in the future