all this is is a protectent of its self ,it will use that layer to protect it self from things, but if it starts to shrivel up i would take it out because that means its dying
i have had a hard time figuring out the species of this fish , the store i purchesed it off said that they didnt no what it was either can anyone help me?
this is some sort of mould or diesese. i think that u should keep an eye on it , it is a coomon fish diesese but ive never heard it to be on a coral. i suggest u just keep it very clean and happy because it may turn out to be something bad
a lobster is very hardy but they will attack anything much smaller than them, if u decide to get one remeber they wont live comfertably in anything less than a 60 gall tank
pherhaps it moved around the back because the current was pushing all the excess food around . try placing it were u wont it and changing the current so it brushes just past it . it should hopefully like that. :)