[KeyWest]

Problem is the last ice age was about 130,000 years ago.

That is plenty of time to establish a coral reef and fauna.

[bobsatwork]

That is plenty of time to establish a coral reef and fauna . 10,000 years is plenty of time for the fauna. 500 years is plenty of time. Krakatoa (sp?) was rendered virtually lifeless by the volcanic explosion there. It is completely restored now.

[RightWhale]

the last ice age was about 130,000 years ago

The last Ice Age ended abruptly, more or less since it is still ending, about 12,000 years ago.