I found this .....
"The adults are quite easy to sex. Juvenile specimens are fairly uninteresting silver fishes, with a broken horizontal stripe running along the flanks. But as they mature, males develop longer, more pointed fins that have lots of spots. Males also have lots of small spots on their heads. Females on the other hand, rarely show any spots at all and their base color matures to a mustard yellow. This fish's color often varies and sometimes the males have a purple base color.
Males grow much bigger than females, with a much more powerful head. This is one of the largest Central American cichlids; in fact it is one of the largest cichlids all together. P. dovii is a pure predator; in its natural habitat, it is rarely interested in eating anything other than fish. Furthermore, the adult fish does not hide from its prey, but roams about openly in extremely clear and very clean waters. Small Wolf Cichlids can't do this, cause they could become a meal for the larger ones.
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HTH
