ive got a lobster with my tropical fish hes about 6 inch long. now ive had him in my tank for about 2 months and everything has been ok up until this morning.i always keep him well fed with frozen fish but when i looked in my tank this morning my lobster and one of my bottom feeders where having a bit of a fight,the bottom feeder is only about an inch long, i managed to seperate them, but the lobster had eaten all of my bottom feeders finsoff, plus its tail and its covered in scratches with blood in them, its not eating at the moment just lying still in the tank
so i dont no if he will survive or not has anyone got any suggestions on what to do 
ps will his fins and tail grow back


ps will his fins and tail grow back