Here's how the STO team describe them:
A felinoid species that originated on the planet Ferasa, Ferasans are closely related to Caitians. Ferasans are bipedal, have tails that assist their balance, extended maxillary canine teeth and large eyes with excellent night vision. Their skin is covered with a soft fur coat, and their felinoid ears can pick up frequencies that most humanoids are unable to detect. Some Ferasans have telepathic abilities.