The specific content is that a farmer is fishing, using a frog as bait and shaking beside the black fry. From time to time, the lifted frog devours its young, the big snakehead bites the frog, and then the farmer catches the snakehead. Because farmers know that where there are black fry, there must be big black fish nearby, so they use a frog as bait to lure the black fish out.
The story of mother snakehead tells us that maternal love is the greatest and most selfless. We should love our mothers and pay tribute to the mothers of animals.