I have a 55 gallon tank that currently contains a 3" convict, 4" firemouth, 4" bichir, and a rapheal catfish. I want to add one more fish to this tank and was wondering if a pike would work? I would like one that is as colorful or interesting looking as possible and would like it to get to 8-10". I have never kept pikes before so I am not familiar with there behavior or species that dont get huge. thanks.