Eska

From Memory Alpha, the free Star Trek reference

The Eska are a technologically-advanced humanoid species that were first encountered by the Enterprise (NX-01) on a rogue planet called Dakala in 2151. For nine generations, small Eska hunting parties have stalked and killed the indigenous lifeforms on Dakala, seeking in particular the shapeshifting beings known as wraiths. Captain Jonathan Archer and his crew were able to protect the wraiths from the Eska by providing them with a chemical masking agent that hid them from the Eska's sensors. (ENT: "Rogue Planet")