The site of the former Miami Seaquarium on Virginia Key is headed for a major redevelopment.  Miami-Dade County and Terra Group’s David Martin want to trade dolphin shows for superyachts with an application to build what could be the largest marina in the county, the Miami Herald reported.  The application, submitted to state regulators, calls for 325 boat slips, about 90 of which could accommodate yachts longer than 80 feet, and a 500-boat dry stack, the outlet said. The plan includes a fuel depot, a network of floating docks that extends halfway across the channel separating Virginia Key from nearby […] This article originally appeared on The Real Deal. Click here to read the full story.