Take grass carp as an example. First, cut the back of the fish with a blade, so that the whole fish is divided into two parts. Then, take off the fish head, slice off the fish spine, and stab the fish ribs with an oblique knife. When using the blade fish fillets, you can slowly cut the knife according to your feelings, and then take out the small forked thorns with pliers or toothpicks.

Get rid of big thorns