Caravelle

Caravelles are a non-sapient species of huge airborne life forms native to the planet Aldebaran-4.

Biology
Caravelles are immense, limbless reptilian-like herbivores and float freely in the atmosphere thanks to a bladder-like structure filled with helium, which the creature is somehow able to synthesize by consuming a particular type of algae. They also have sail-like mobile membranes which allow them to be easily propelled by the wind currents.

Cultural significance
On their homeworld of Aldebaran-4, these creatures are naturally used as a source for harvesting helium, which is done in a way that does no permanent harm to the Caravelle.