The fishing effect of black hydra is better. It contains 17% protein, and its essential amino acids account for more than 50% of the total amino acids, so it is a good bait. Compared with other live worms, fresh breadworms have a light taste and the effect of attracting fish is not ideal. Second, the bread worm molts many times, and the stratum corneum has been on the skin, which is very bad for fish.