What is this Invert?

[Oscar]

Originally Posted by MMAX

It doesn't take very long for them to reproduce. I have a pile of them in my tank. Isn't a bad thing since my hermits killed off all my snails, something else to keep the tank clean.

I just added some astrea and Nassarius snails this weekend. Hopefully they are too small for the hermits to kill for new homes and there is enough algae for the hermits to not bother with the snails.