Corals... Ever wonder?

[AndyL]

I was doing some long overdue fragging tonight...

While I was cutting into some really nice acan. echinata, I noticed something that made me stop and think. Ever wonder how long this 'rock' took to develop?

I was undercutting the edges of the almost flat colony, the rock it was on, was in fact layers upon layers upon layers of A. echinata skeletons. Makes ya think doesn't it?

Andy