Gobies, also known as red tilapia, are a freshwater fish that are mainly distributed in the Amazon River Basin in South America. In Guangdong, gobies are not common aquarium fish and are generally not easy to find in local freshwater fish markets. Because of their special living environment and breeding requirements, and because they are alien species, they are not common in Guangdong. If anyone is interested in gobies, they can be purchased through professional fishery markets or aquariums, but they need to pay attention to relevant laws and regulations and environmental protection policies.