2. In fact, they all refer to the guppy, but some merchants in order to sell, and hang out a different name.

3. The scientific name of the guppy is Siniperca chuatsi, which belongs to the genus Siniperca in the order Perciformes, family Serranidae.

4. The genus Siniperca is a freshwater genus, in which the fish live in freshwater, not in the ocean, so naturally there is no guppy living in the ocean.

5. The sea guppy, although named with the word "sea", is not a sea fish, but also a freshwater fish.