Divers and snorklersare always looking for ways to identify the fish they see.  Some of us carry plastic ID charts, some have ID books.  Here is another to learn to identify the fish you see.  The Palm Beach County Reef Research Team has currently 23 fish ID quizzes on their site. 

REEF is another non-profit that has ID quizzes.  REEF quizzes are by ocean area, Caribbean, Eastern Pacific and so on.   So if you really want to learn take a test a week.