The Red Sea Sailfin Tang is one of the most beautiful tangs.  6' Tank is needed to house these fish because they will get quite large up to 16".  We recommend at least a 180 gallon tank.  This is a fish which gets nicer as it gets older with more coloration details.  There are two species of the Sailfin Tang, which one is from the Red Sea and the other from the Pacific Ocean.  The Desjardini (Red Sea) will grow much larger than the Pacific.  The be able to tell the difference in both of them is the Markings on the Desjardini, which the lines going to the bottom of the body become dots.