All the fishes in the surgeon and tang family are so called because of the
existence of razor-sharp scalpels tucked into hollow sheaths at the base of
the tail. When angry or afraid the fish can raise these devices at right angles to the
body and, as a result of a threshing action of the tail, inflict terrible wounds on the
body or fins of an adversary. These fishes will not hesitate to inflict the same sort of
treatment on a human hand, so the greatest possible care must be exercised if handling a
member of this group.
Like all the members of this family, Emperor Tangs have a great liking for green-stuff
in their diet. Three or four times each week, these fishes should receive a good feeding
of freshly thawed frozen spinach, or better still, fresh spinach. Such vegetation does
not, of course, exist in the fishes natural environment, and so most coral fishes
have to be taught to eat it. This is best achieved by allowing the fishes to fast for a
whole day. Then, on the first feed of the following day, spinach (or even chopped lettuce)
should be offered. Usually the fishes will be so hungry that thye will swallow the
proffered food without realising what they have eaten, and an increasingly strong liking
is usually developed for this valuable food. All the surgeonfishes and tangs are swift and
powerful swimmers, and have a real need for large open spaces within the aquarium.