Wikipedia
Melfan (Sector General)
A Melfan ( physiological classification ELNT) is one of about seventy known intelligent species in the fictional Sector General universe, and one of the most common species in Sector 12 General Hospital itself. Overall, a Melfan resembles a 6-foot-long crab. Compared with most other races, they are very emotional and passionate people. They, like the majority of races in the Sector General universe, wear no clothing or body ornaments.