"He was an old man who fished alone in a skiff in the Gulf Stream"

The Gulf Stream; warmer water is red, colder is blue. NASA image.
Public DomainThe Gulf Stream; warmer water is red, colder is blue. NASA image.
The Gulf Stream is an Atlantic Ocean current that "[begins] in the Caribbean." It "plays an important role in the poleward transfer of heat and salt and serves to warm the European subcontinent."