STREIB

The Streib is a secretive humanoid species which developped a space faring civilisaton. They are distant relatives of the Vree but it remains unknown when or how both civilisations came to evolve on different worlds. The most obvious difference between the two races is the configuration of the eyes. The Vree's eyes are pure black, whereas the Streib's eyes have a red slit down the center. Both culture share the trait of kidnapping other species and examining them onboard their ships. Streib alos share a lot of physical resemblance with Zeners and other Shadow servants.
Source: Babylon 5 universe