Flaxian

Flaxians are a sapient, spacefaring humanoid species with multiple tendrils protruding from their foreheads, chins and the back of their hands.

Culture and society
Flaxians are often hired as assassins by other species. Some of the methods employed by Flaxian assassins include fragrances which are harmless on their own but when combined produce a chemical reaction that induces a fatal heart attack when inhaled. They're also known for using pheromonic sensors programmed to trigger an explosive device only in the presence of a certain species.

Appearances

 * Star Trek: Deep Space Nine, s03e20, "Improbable Cause" (1995)