I have had my damsel for a couple of years and had the purple lobster for about 6 months with no issues. I came home from work today and one of my damsels has a chunk out of his side. he is still swimming around no problem and he just ate some pellets but it doesn't look good. Any advice on what I should do? I have just fed the lobster a whole lot of shrimp so hopefully that will satisfy him for now.