Legend of Korra Season 2: Discussion thread. Spoilers ahead.

[WIzarDE]

Nop, I actually would have liked if the Lion turtles would be shiling in the spirit realm ... but acording to the wiki "and was also the last of his kind, as the rest of the lion turtles were hunted and killed thousands of years ago."

http://avatar.wikia.com/wiki/Lion_turtle