There are over a hundred described pikes. Lugubrious pikes grow to 12-14". You may have to fatten them up on live but most will except pellets. I have a johanna that eats Algae wafers. And my 3 Lenticulatas all eat a wide variety of food. The main thing with pikes is aggression Some are tank dominators, others are very placid community fish. I keep my Johanna with angels, but my Lents would kill them in a heart beat.