Virginia Key is a 863-acre (3.49 km2) barrier island in Miami, Florida, United States in Biscayne Bay, south of Brickell and north of Key Biscayne. It accessible from the mainland via the Rickenbacker Causeway.The island is mainly occupied by the Virginia Key Beach Park, Miami Seaquarium, and the University of Miami Rosenstiel School of Marine and Atmospheric Science.