Real World article
(written from a Production point of view)
Alien couple, Inside Man a beach alien (right)

David Polk is an actor who appeared as a beach alien in the Star Trek: Voyager episode "Inside Man". As a background performer, Polk received no credit for his appearance and was identified by the name tag of his swimming trunks which were sold off on the It's A Wrap! sale and auction on eBay and previously worn in the Star Trek: Deep Space Nine episode "The Way of the Warrior". [1]