Sehlat

A Sehlat is a type of animal native to Vulcan (planet) and appeared as large bear-like creatures. Appearance wise they were noted to have six-inch fangs and possessed fur that covered their bodies. They did not like to climb and prefered to remain close to the ground which provided a way for travellers to escape such animals. Captain Jonathan Archer and Commander T'Pol used such an option to escape a wild Sehlat in 2154.

Despite their appearances, Sehlats were known to be domesticated by Vulcans. (TOS episode: Journey to Babel). However, these domesticated versions of the animals were far smaller then 'wild' sehlats that prowled the harsh deserts of their homeworld. It was a noted that Vulcan children were never late with their pet Sehlat's meal due to the aggressive nature of the animals. (ENT episode: The Forge).

Sarek had a pet sehlat named I-Chaya which later passed in ownership to Spock. Sadly, I-Chaya was killed in 2237 after sustaining injuries from a Le-matya. Spock chose to euthanize I-Chaya's in order end to end his pet's suffering. (TAS episode: Yesteryear)

In the deserts, a type of sehlat known as a Vai-sehlat was known to lay dormant in caves until something disturbed its sleep. (TOS novel: Vulcan's Soul Exodus).

It is possible that a wild Sehlat is known as a vai-sehlat.