I. Difference:

The grouper's mouth is short and pointed and small, while the tiger grouper's mouth is wide and large.

The grouper does not have a dorsal fin, the tiger grouper has a dorsal spine and spikes.

Two, grouper, also known as the black catfish as shown in the following chart:

Grouper physical characteristics, similar, general body in the long, side flat, colorful, variations are very much, often brown or red, and has stripes and spots, mouth large, teeth fine pointed, some expanded into canine teeth, dorsal and anal fins and hard spines, is very well developed, red dot grouper and cloudy grouper, the green grouper due to the color of green-brown, it is also known as green spot, so it is also known as green spot, the grouper has no dorsal fin. brown color, so it is also called green grouper, is one of the more productive in Fujian. The grouper has an oval body, laterally compressed, a large head, a short and bluntly rounded muzzle, a large mouth, a well-developed supraspinal bone, a body clad in tiny pectinate scales, a strong dorsal fin, and a body color that can be changed according to changes in the environment. Adults are usually 20-30 centimeters in length.

Three, tiger spotted: common varieties of grouper, body yellow to light brown, the most beautiful golden yellow, there are five irregular dark brown spots arranged vertically, the whole body is covered with dense tiny brown spots, in the spots on the spots on the darker color, the back half of the caudal peduncle has a black saddle-shaped small markings, the fish skin is thick, the head of the belly plump, succulent and crisp.

The Tiger Spot is an economically valuable food fish that can also be used for aquarium displays. It is generally caught by longline nets and a fishing rod, and now the production of artificial culture is not small. It is excellent for steaming and eating, but due to the food chain, it may contain ciguatera fish poison, a tropical marine fish poison. However, most of what we currently buy in the market are captive-raised tiger spots, so poisoning is basically non-existent.

In addition, the pearl gentian, which is very common in these years, is the hybrid offspring of the tiger garoupa and the saddle-ribbon grouper (amberjack), and has the characteristics of the tender meat of the tiger garoupa and the fast growth rate of the amberjack. At present, it is the most successful culture in China, and the highest yield of hybrid grouper.