What kind of fish is sea bass? Is it a common tilapia in southern China?
There is no rock bass in nature, just a fish made up casually in the game. If it is a perch, perch is a species, and there are four most common species: perch, Songjiang perch, big mouth perch and sea bass.
Perch belongs to the order Perciformes. Tilapia (African crucian carp) is also an order of Perciformes, but it belongs to Callichthyidae.
Species of different families and genera are far apart.