Siren

Siren are a supernatural species with telepathic abilities.

History
Externally, Sirens were physically indistinguishable from mortal and witches in every aspect but one: the irises of their eyes were completely black. They could cross-breed with mortal, along with other species like witches and werewolves. Sirens iris coloration was present in half-siren individuals such as --, but in those with less Betazoid blood such as Devinoni Ral and Walter Pierce (who were only ¼ Betazoid), normal Human eye coloration was possible. (TNG: "The Price") Sirens had a gestation period of ten months. (TNG: "The Child")