See Tarpon on the Bahia Honda Bridge Camera:
This cam is positioned in twenty feet of water on a concrete piling of a bridge in the Florida Keys. It is COMPLETELY powered by wind and sun. Click here to find out more. It was installed by the teens4oceans crew in December or 2008, and was recently reinstalled by a group of 11 students at the end of June. A photo gallery of the new equipment and installation process can be seen here.
Be patient and you will see some large tarpon along with snappers and other fish facing into the current.