Maybe. The diver or the wholesaler may have done it already and it may have developed a secondary infection. What type of conditions was his tank at the store? Was it just an empty tank so it had no choice but to be swimming in the open? Anthius in general are very finicky and sensitive. It's possible for an lfs to put a fish on display in an empty tank with surplus flow to keep it moving. If it was fresh out the bag who knows what it's been through.
It's a friend of mine, but he said they had come in the day before. Yes, they were just in a cube.