Here is a good link for the State of Florida, for most of the artifical reefs around the state. Water Proof makes a
good chart for the Keys. They have several. Upper, Middle,
and lower. They also have numbers for diving and fishing.
Select Monroe County, and Go fishin'
See ya, Ken
http://marinefisheries.org/ar/reef_locator.asp
http://www.waterproofcharts.com/florida.html