Different sized lips on the front determine the depth they will dive to and stay at during retrieval (constant reeling in.) The bigger the lip, the deeper the depth. They range from like 3' to 15 or 20'...They are expensive but deadly if you know how to use them...In a survival situation, i would rely on ole trusty...The carolina rig. I catch nice sized bass nearly every day i use it. Its a way to rig up your line and retrieve the casts. For the price of a nice crank bait, you can buy the components to 20-50 carolina rigs...lol....Just my 2 cents
One of the best general use IMO is the beetle spin, white body with red dot and a silver spinner. But it all depends on where you're fishing. Example, for large/small mouth at Lake Nacogdoches, watermelon seed worms great. At Lake Sam Rayburn/Toledo Bend, green with the red glitter, Lake Timpson, black fire tails. All these lakes are semi close to each other. I don't use live bait much anymore unless I'm letting the bait sit and I'm not casting far. If I have to cast far or work the bait, it's going to be artificial.
I thrust metal spoon n fly. those plastic fish don't work for me so I sold of 3 box n still have some.
In fact at 1 pond, the fishes don't take plastic fish. they take fly n rubber lures. it is a paid pond, catch n release
rule. we in our country use normal spinning rod with lead to cast fly. we called spin fly.