Mettus

Mettus was a Denobulan and the second youngest son of Enterprise doctor Phlox. (Star Trek: Enterprise)

Canon information
He was estranged from his father for some time. (ENT: "A Night in Sickbay") He was also prejudiced against the Antarans. His father attempted to contact him after 10 years in 2153. (ENT: "The Breach")
 * ''See Memory Alpha for more information.

Star Trek is...
In Star Trek is..., Mettus was a civilian scientific observer aboard the SS Yorktown (NCC-108) for some time by 2229. He had more experience than any other crewmember, and was only slightly younger than Skurpaj.