Currently, there are 3 Black opportunity districts in Florida. To my knowledge (I may be off base) one is Black Majority and BVAP majority, one is Black majority, and one is black plurality. These are FL - 24, FL - 20, and FL - 05 respectively.
When drawing your own districts, the 24th is easy, Just grab all the black precincts in Miami-Dade and Miramar and then you should be good to go. I typically end up filling the small remaining population requirements with Miami Hispanics.
The 20th is the most confusing of the three. In its current inception, the district contains the black precincts in and around Fort Lauderdale and West Palm Beach. The two areas are connected by the Everglades, which actually have a small black population on the shore of Okeechobee. Alternatively, you can ignore the everglades and connect the districts two parts by running along the coast picking up the back communities scattered throughout Palm Beach county.
For the 5th, you have three options. First, you can essentially do what is in place now and go west from Jacksonville to Tallahassee. This district is only about 46-48% black depending on the lines, however it was found to be acceptable in the court ruling last year. The second and third options have the district following its old, weirder lines south to Orlando. If you choose to keep the district compact, it will still be only plurality black. However from recollection, you can get it above 50% if you decide to get crazy and go into Volusia.
Hope that helps.
Florida Congressional District (Map and Statistics) (PDF)You are correct.
Curiously, FL-20 is the second most "compact" district in Southeast Florida as measured by Reock (compares area of district to area of circumscribing circle). the tentacles don't enlarge the circle that much, while picking up three separate black areas. Meanwhile the Everglades provides all the area and a connection to "Bell Glade".
FL-26 also is reasonably compact by picking up the Miami-Dade portion of the Everglades west of Miami.
FL-16 comes into southern Hillsborough, but also grabs the part of the county in Tampa Bay that swings south of St.Petersburg. Other districts along the coast take advantage of the three mile limit to beef up their areas.
FL-5 manages to fail the impossible-to-fail compactness test used by the North Carolina General Assembly.