Nibari are at the far end of what would be considered a "Sebaceanoid" - biped with blueish skin and often bright and light colored eyes and hair. Quite lithe. Hynearians... are also bipeds, but look more like an upright frog than anything. [They also have a very fascinating internal structure, and Nibari have a fascinating brain. But he won't delve into those]

Delvians are another near-Sebaceanoid externally, albeit with blue skin and scale-like lines on their body - but internally they are extremely different. Being descended from plants, they lack a skeletal structure as an animal-descended species would recognize.