i have seen two variations of red tails one is normal the other is a faded red and also the bodies the faded tail is also a lighter black .
is this due to the faded tail black shark being a juvinile or ??
Mine like yours mooey65 is jet black with a very bright red tail. However, I put the colour of his tail down to the fact that I use Tetra Pro Colour food. In fact most of my fish have brighter colours than you see in the LFS's.
My little shark is jet black with a vivid red tail and little white spots on the tip of his dorsal fin, and he been like that ever since i brought him,