theyer wonderful... untill they start breeding and something atempts to swim past them. But if you keep them in a tank by themselves or in a realy big tank theyre wonderful. Mine were realy shy at first, but they over came it pretty quick and theyer a blast to feed... not to mention beutiful. I have two, somehow lucked out enough to get a male and a female as the last two Petsmart had left when their fish went to 75% off at the store near here, so now that theyer grown up I just got my first sucsessful breeding and am trying to find people to sell the babies to (once they reach a couple inches) so I can finance a bigger tank for the parrents... and maby some of the babies :-D