This video from the USA says about itself:
17 February 2017
Every summer, thousands of baby tropical fish are taken from the Caribbean up the east coast of the USA by the Gulf stream. Some make it all the way to New England, where they will die in the fall when water temperatures drop. Jonathan joins the New England Aquarium Dive Club on a rescue mission to save these baby fish before winter.
JONATHAN BIRD’S BLUE WORLD is an Emmy Award-winning underwater science/adventure program that airs on public television in the United States.
Dear Kitty. Some blog 
Pingback: How tropical fish can survive cold water | Dear Kitty. Some blog