A human head was discovered on Key Biscayne beach, Florida, on Tuesday morning, prompting a major investigation by Miami-Dade police. The head was found by a beach worker around 8:30 a.m. and has left local residents and tourists deeply unsettled. Authorities are collaborating with the Medical Examiner's Office to identify the victim and determine the cause of death, considering possibilities such as homicide or a marine accident. The discovery coincides with a search for a missing 19-year-old swept away by a rip current in nearby Miami Beach, though no connections have been confirmed. The beach area was cordoned off, and no additional remains have been found as of yet. The incident has sparked concern among locals about safety in the area, which is typically known for its peaceful environment.