The Retizians are a species from the planet Thetalian Prime. They have pale, mottled skin (although it grows darker at times) and have black quills protruding from their chins. As they grow older, these quills grow.
The Retizians prize corlandium, which is produced on their homeworld by tiny organisms, although only in small amounts. In 2372, Esteban Lopez planned to turn over his former USS Saratoga crewmembers to the Retizians for the corlandium producing organisms they had been infected with for several years. The Retizians planned to hold them prisoner and extract the organisms. (DS9 novel: Saratoga)