Of there's life like anemones and coraline algae plus the millions of bacteria you can't see it's alive and as the cycle completes bacteria are going to multiply and become it's own ecosystem.
Liverock takes many forms and comes from many places most people can't tell you where it comes from I have somecweird looking pieces and I've seen even weirder and nicer pieces in different tanks round, flat, branched, smooth, sharp, hard, brittle ... one of the most enjoying parts of your tank you'll have is custom picking out your liverock and trying to visualize it in your tank
