Dumping is defined as the act of selling a commodity in another country at a price below the cost of its production  Shrimp producers in country H are selling river prawns in country M at a price lower than the cost of producing the prawns in country M
So the shrimp producers in country H are dumping shrimp in country M
The cost of production in the definition of dumping refers to the cost of production in the place of origin of the product, or the cost of production of the same kind of product in the place of sale