The main differences are, different classification of subjects, different morphological characteristics, different habitats, as follows:

A, different classification of subjects

1, river perch

River perch, also known as five black. It belongs to Scleractinia, Perchiformes, Perchidae.

2, sea bass

Sea bass, also known as ? Seven-starred sea bass, sea bass, green sea bass. It belongs to the order Scleractinia, order Perciformes, family Serranidae.

Two, different morphological characteristics

1, river bass

Body lateral compression, long oval, caudal peduncle is thin. The head is small, the muzzle is blunt, and the mouth is terminal. The lower jaw is slightly longer than the upper jaw, the posterior end of the maxilla reaches below the eye, and there are fine teeth on the upper and lower jaws and on the skull of the mouth. The posterior margin of the anterior gill cover bone has many small serrations, and the posterior margin of the posterior gill cover bone has 1 spine. The two dorsal fins are slightly separated, the pectoral fins are lateral and lower, the ventral fins are pectoral, and the caudal fin is shallowly forked, with the ends of both lobes rounded.

2. Sea bass

Larger in size, the fish is thick and longer, covered with small scales, and the tail is straight and sharp or rounded. The dorsal fin is an important feature and consists of a spiny part in front and a soft strip at the back, the two parts are usually connected and sometimes separated by a V-shaped indentation.

Three, different habitats

1, river perch

River perch live in rivers and lakes thick with plants. Usually there are two groups, a population living in shallow coastal waters, invertebrates to feed on, smaller individuals, growth is also slower, another population inhabiting deep water, to small fish to feed on, larger individuals, faster growth, three winters up to maturity, the largest individual up to 500mm.

2, the sea bass

Inhabiting the estuary of brackish and freshwater, but also in freshwater life.

Expanded Information:

In its natural environment, the largemouth bass prefers to inhabit sandy or sandy muddy. Low turbidity and aquatic plant distribution of the still water environment, such as lakes, reservoirs largemouth bass veritable large mouth? The shallow water (1 to 3 meters deep), swampy streams, river stagnant areas, ponds, etc., especially like to live in groups in the clear slow-flowing water.

Generally active in the lower and middle water levels, often hiding in the underwater rocks or plants. Do not tolerate low temperatures, in the water temperature range of 1 ~ 36 ℃ can survive, 10 ℃ above the beginning of feeding, the optimal growth temperature of 20 ~ 30 ℃. Water dissolved oxygen requires more than 1.5 milligrams per liter, and is more resistant to low oxygen than Mandarin fish.