If they were crocs (salties) then it would be a damn brave bicyclist!
I actually saw something similar (though not as many) during a trip to Cape Canveral, Florida in 2004... There were gators amongst the canals lining the road to the launch facility.... pretty spectacular..... now thats what I call security!
Rules of debunking
Any conventional explanation is better than none.
Don`t bother me with the facts my mind is made up.
If one can`t attack the data, attack the people, it is easier!
Do one`s research by proclamation; investigation is too much trouble.