For the fish, good choices in Thailand would be Pangasius (Shark Catfish), Barramundi, and Tilapia. For those in the US / Canada, good choices can be Tilapia, catfish, whitefish, bass, drum, cod, grouper, snapper, redfish, etc.
Rinse the fillets, don't dry them, and to make them easier to manage in a pan, cut each fillet in half crosswise to make 2 smaller fillets.
Mix together the bread crumbs and paprika in a shallow bowl. Roll the fillets in the crumbs to coat them well. I used two large fillets, each cut in half to make 4 pieces, easier to manage.
Heat the butter in a large non stick pan on medium heat. In a separate saucepan, heat the coconut milk to a near boil.
When the butter is hot, brown the fillets on each side, work in batches if needed, then when all are browned, return all the fillets to the pan.
By this time, the coconut milk should be at a near boil, or boiling, pour that evenly over the fish in the pan. The fish should be covered or near covered, let this simmer for 3-4 minutes, the fish should easily flake with a fork.
Sprinkle with parsley as desired and serve.