Most people on this bb, including me don't agree on live food. There are alot of frozen foods to feed you puff. Brine, squid, krill(they love this stuff), beef hearts, prawn, and try to feed some greens such as spinach, algae etc.
Good luck
I would not feed her imitation crab or anything else that is processed. It's loaded with preservatives and additives that are most likely bad, not to mention that the pollock that its made with is cooked. Stick with raw natural foods. Shrimp, squid, Krill, along with foods designed specificly for your fish.