Just my 2 cents:
I would highly recommend Jim Abernethy's Scuba Adventures (www.scuba-adventures.com or 888-901-3483) in Riviera Beach. Great diving, excellent dive guides, and very photography friendly. While there, I would also definitely check out Blue Heron Blvd Bridge which is "next door" to their operation. It's a beach dive but must be done from about 1/2 hour before to 1/2 hour after high tide. To check the tides go to www.saltwatertides.com and check under "Port of Palm Beach" in the Florida Atlantic section. If possible get Jim Abernethy, Laz Ruda, or one of the other dive guides to go with you as they are great critter finders. You can find seahorses, frogfish, sea robins, star gazers, batfish, and lots of other great stuff. Laz is especially good at finding great macro life!!!
As far as Crystal River goes, September is too early to have lots of manatees as the Gulf of Mexico is really warm right now (87 degrees). The manatees show up in Crystal River in great numbers once the Gulf gets colder than the springs (72 degrees). That having been said, you should check with one of the operators and see how the manatee population is doing. I would recommend Birds Underwater (www.birdsunderwater.com) though there are a number of other good operators as well.
Have a great trip!
Doug
Hi - I'll be in Palm Beach alone with a car and have 5 days (Sept 23-27) to dive Florida. Any recommendations for areas/operators for this time of the year? I don't mind driving. I'm considering a day over at Crystal River for manatees.
thanks for any help.