Invasive Lionfish. Lionfish caught in the park by a resource manager. NPS image by Yasmeen Smalley. Privacy Policy. Indo-Pacific lionfish (Pterois volitans, Pterois miles) have spread from the Caribbean Sea to Northern United States coastal waters. In some areas of the Atlantic Ocean they are now as abundant as native grouper species. Sightings of lionfish in park waters occurred as early as 2008, yet lionfish were rare until 2010. They are actively removed from park waters whenever possible. Invasive Lionfish - Biscayne National Park (U.S. National Park Service)