Sealed book of Mormon Ch.7

AND it came to pass that Adam and Eve were
placed in this world in a part thereof that was
separated from the rest of this world that had
already been created, and they were separated
by many waters.
And this part was known as the garden of
Eden. And this garden was like unto the world
that the brother of Jared had described when he
visited the kingdom of the Father and met his
Eternal Mother for the first time.
And the brother of Jared beheld that the rest
of the world was inhabited by all manner of
beasts and fowl, and that fishes were abundant
in the seas and in the oceans. Nevertheless,
Adam knew nothing of these other beasts and
fowls and fishes.
Behold, there were also animals that
appeared like unto Adam and Eve, they having
lived among the order of animals in the other
parts of the world. But Adam and Eve knew
nothing of them, nor did these other mortal
beings know about Adam and Eve