It is possible to raise them easily and rapidly in any place at low cost.

One of them contains more than 70 percent of protein, vitamins, fatty matters and other substances good for such domestic animals as chicken, duck, pig and goat.

The other, with more than 60 percent of protein and essential amino acids, is suitable for fries.

Excrements of the insects are also used as fish feed.

The fatting rate of fish fed with them doubles what it was before.