And also in the Caribbean - underwater volcanic vents

Explorers in the Cayman Trough have found the world’s deepest known underwater volcanic vents called smokers which emit very hot mineral solutions and gases and provide an envionment for exotic and strange creatures. The Cayman Trough lies just north of Jamaica and south of Cuba.
See this picture of a smoker from Wikipedia:

For more on this see:
http://www.compasscayman.com/caycompass/videos/Black-smokers-found-in-Cayman-Trough
http://ca.news.yahoo.com/s/capress/100412/world/eu_britain_volcanic_vent
http://www.noc.soton.ac.uk/nocs/news.php?action=display_news&idx=723