Valentini Puffer and Inverts?

[sundog101]

I'm in the planning stages of a 40g soft coral tank and would really like to have a valentini puffer. I know they can eat inverts, but does anyone know of an invert that would be safe or more safe to have in the tank. I was thinking maybe a sea urchin? Any other ideas? Thanks!

 

[eatbreakfast]

Urchins, md conch, serpent and brittle stars.