Lobster

Lobsters can be fished with a lobster pot, and they are catched extremely quickly, at a much faster rate than swordfish, so it is cheap and affordable, plus it heals 12, only 2 below the swordfish healing power, so it is better to use in the wilderness. They also make good training food. One example of this is at Karamaja, where people fish lobsters periodically and when they get a full load, they cook it on a fire and fight the damaging lesser demons. When their food depletes and they are injured, they go back to fish more food.