We have three triggers (Picasso, Pinktail, Undulated, with mushroom coral and button polyps, and they have been together for almost 2 and 1/2 years. We purchased 150 hermit crabs about 1 year ago, there are maybe 5 to 10 left. One was the size of a baseball, others were dime to nickle size. IMO Corals yes, inverts no.
Later.................C