- You would think that the annelida family would be huge and everlasting, given the fact that they can regrow any part of their bodies that gets cut off, leaving them seeming almost immortal; they can even divid themselves into more than one worm, meaning there could be twice as many worms then you started with. However while it seems like they should be taking over our earth, this is untrue. In order to even out the playing field, these worms do not live a very long life and are born as young adults rather than babies.
- Many annelids do not come above ground because whenever they do they almost always get eaten.
- there are over 17,000 modern species.