I feed my fish live crickets, live mealworms and live earthworms on a fairly regular basis.
I've heard of people drowning/cutting heads off/freezing mealworms and pulling the spiny back legs off crickets to avoid injury to the fish. I personally think a bug chewing through the stomach of the fish is bunk. Unless the bug could live through the chewing and serrated edge throat of a fish (in the case of an arowana), plus that of drowning, i doubt it could inflict any damage. I feed jumbo mealworms and large crickets all live and have had no problems, yet.
I've heard of people drowning/cutting heads off/freezing mealworms and pulling the spiny back legs off crickets to avoid injury to the fish. I personally think a bug chewing through the stomach of the fish is bunk. Unless the bug could live through the chewing and serrated edge throat of a fish (in the case of an arowana), plus that of drowning, i doubt it could inflict any damage. I feed jumbo mealworms and large crickets all live and have had no problems, yet.