The fish shop has a professional scanner, after scanning the chip in the fish body, you can identify the chip code, which corresponds to the certificate, and then go to the fishing site provided on the certificate or telephone to check the authenticity.
This allows you to look up the details of your arowana's ancestral generations to determine its lineage. Good pedigree is very important for a dragon fish. Just like many good breed dogs, police dogs have chips in their bodies, and the same is true of arowana.