I am sorry, I didn't notice you wrote Lenticulata. They get 12 to 14" are piscivores. They can be extremely aggressive especially with conspecifics They need a big tank and clean water. 125 gal would be agood size for them. Do large water changes weekly. They can be kept with other fish that can hold there own but not too aggro. Severums and Festivum are good tankmates. As are GT and JD. Do well with cats that can't eat them and are too big for them to eat. Such as plecos and pictus, and striped rapheal. Pikes like caves and driftwood to hang out and ambush prey. Feed a varied meaty diet. Start them on pellets as soon as possible. These fish are gluttons. I have 3 on the way,plus a Johanna that has grown from 3" to 10" in about 3 months. Truly a great fish. Of course each fish has there own personality, my Johanna doesn't get very aggro with anything, whereas others have Johannas that kill everything in the tank. Congrats on your new aquisition.