This is a peaceful fish that stays small, usually no larger than 3". We have had it for over 1 year and it is nice and healthy. This fish has been in our tank for about 1 year with no diseases and eats anything. The healthiest fish a customer can buy has been adjusted to aquarium life for a long period of time (3 months or more). 99% of marine fish that are for sale have been just recently caught and shipped across the world. This process is so stressful often causing disease like ich or other parasites and loss of appetite. Marine fish already adjusted to aquarium life are very hard to find and well worth a little extra cost. Plus we do not rotate new fish through these systems weekly which increases the chances of dise