The Miami Seaquarium is a 38-acre (15 ha) oceanarium located on the island of Virginia Key in Biscayne Bay, Miami-Dade County, Florida, United States and is located near downtown Miami. Founded in 1955, it is one of the oldest oceanariums in the United States. In addition to marine mammals, the Miami Seaquarium houses fish, sharks, sea turtles, birds, reptiles, and manatees. The park offers daily presentations and hosts overnight camps, events for boy scouts, and group programs. Over 500,000 people visit the facility annually. The park has around 225 employees, and its lease payments and taxes make it the third-largest contributor to Miami-Dade County's revenue.