I believe the most direct way is to call the police and let the police tell him what kind of creature it is. Once it is sold, it will be suspected of breaking the law. I believe that after some education by the police, he will never dare to sell this species again, and when he sees that these creatures are far away, he will never dare to provoke him again. No one wants to be a partner with the prison. In fact, many people don't know much about the protection of animals in China. They think that the animals they catch can be eaten and sold, which seriously affects a protection law.
So how can we clearly judge that this is to protect animals? As long as we remember one thing, as long as it looks good or we don't recognize it at all, don't touch it, it may lead to a very high sentence. This is no joke. Some creatures are very humble, including some plants. If you trample or destroy these plants, you may stay in prison for a long time.
In fact, the best way is to be kind to animals and plants and not to destroy or destroy them. Only in this case can we absolutely guarantee that we are safe. I once heard a story about a farmer who was sentenced to 10 years in prison and paid a fine of tens of thousands of yuan for chopping down trees for firewood. It turned out that the tree he cut down was a national first-class protected plant, and the punishment of 10 was already very light.