Pahvan

The Pahvans were a race native to the planet Pahvo, located somewhere in the Alpha or Beta Quadrants.

Physiology
The Pahvans manifested as clouds of glowing blue particles. According to Saru they existed in total harmony with their world, as a "symbiosis between nature and the living spirit". They also had the ability to teleport individuals.

Culture
The Pahvans wished to contact others beyond their world and share of themselves. using a massive crystal transmitter, they broadcasted distinctive "music" created by the planet.

Source

 * Star Trek Discovery: Si Vis Pacem, Para Bellum