this fish is more black than silver, the coloration is similar to that of a black diamond piranha.Ive got 3 red hooks and not all have developed red spots on them. One has a hook just like yours that has just that little extra bump on the hook portion. I think of them all as regular red hooks.
nope, its not a blue hook, the mouth structure is different also. 1 thing i do notice is that its coloration is turning darker and darker.That could actually be a thick barred silver dollar (blue hook) Myleus scombergki please excuse spelling. Does it have a black bar running down its side especially after a water change?