Spherion

The Spherions were a species of sentient crystals.

Their spawning grounds were destroyed when aliens colonised their home planet. As a result, they set off to find new spawning grounds. The Calaxi's physiology made them the perfect incubators for their seeding crystals, but the Spherions had no idea that they were sentient and so when the Calaxi fled Malleon, the Spherions followed.

Josie Day managed to convince them that the Calaxi were sentient and to leave them alone. (COMIC: Music of the Spherions)