It depends on depth, speed, and profile of presentation, type of bottom, and any cover present. The answers to the riddle could be as diverse a bait as a top water, a T-rigged worm, a lipless trap style bait, spinnerbait, square bill crank.... and on and on...
All baits to me are "search baits." There is not a time I'm not searching for a bite if I'm casting.