"A silk worm or hair worms or can be called by the name of Tubifex in scientific terms. This type of worm is one of the most widely cultivated (farmed), due to extensive market share can be reached if the silk worm's business.
The size of this worm is that most small and soft and malleable, than other types of worms in general.
This worm size even average only 1 cm only, it makes this worm food commodities for small animals such as fish, ducks, chickens, ducks, etc."