they are scorpionfish family members(meaning they are venomous), which also means they will eat anything that will fit into its mouth. The good news is that they have really small mouths.
Next, they have a poor survival record in captivity, they ship poorly, but feed well.
so well acclimated fish might be the ticket
Also be aware that these fish live hidden- i mean really hidden in the branches of corals. Many folks report never seeing them again once they put them into their tanks, only to find them when they are removing rockwork.