I have been keeping a pike for about 3 weeks now, Johanna, and boy do they change colors. They change colors about as fast as an octopus. And they also grow really fast as well, mine has grown about 1-1.25 inches in 3 weeks. I also know now, that it is very difficult to get an accurate ID on some species until they get older. But so far, my pike is definately top fish freshwater wise.