Opposite of death. Sideways from undeath.1)

Oh, wait, you're asking about the things that live on the Island. Silly us.

A partial list of life forms on the Island include:

* Contestants.

* Lemurs.

* Catfish.

* Fish.

* Squirrels.

* Stick Lobsters.

* Birdies.

*Spiderkitties.

As improbablobiologists continue to catalog life forms, more will be posted. 2)

1)
A.K.A. your everyday zombie.
2)
Providing, of course, any of the improbablobiologists last longer than ten minutes without being eaten.