I bought this beautiful 3.5 inch Maximus Clam at Reef-Apolooza show in Orlando. The next morning it has 5 hermit crabs on it. I thought they were eating the algae off the shell. Come to find out they were eating the clam. I found one in side the shell. I remove all the hermit crabs into my sump. I had no idea that these guys would attack my Clam. Are there other predators to watch out for. I also have an emerald crab and a firecracker shrimp. Could they be issues also? Do you think my Clam will survive?