Common sea fish are sharks, striped bass, grouper, mahi-mahi, and tuna.

1, shark

The most dangerous of the sea fish is the shark, which is relatively large and fast, with a cartilaginous skeleton, and no real bone tissue, although its skeleton will calcify. Sharks have an undeveloped exoskeleton, more diverse teeth, and because of their many species, they vary in size from large to small.

2, stripers

The stripers have a very ferocious temperament, with a silvery-gray body, but the tail is black, and the length is usually about 1 meter. It is mainly distributed in the western Pacific Ocean and the Indian Ocean, is one of the main seafood in China. The swimming ability of the striped bass is relatively poor, and it will float on the surface of the sea during the day and descend to the bottom at night.

3, grouper

Grouper is a warm-water medium-sized and large fish, generally more widely distributed in the tropical and subtropical waters. Its species are more, generally inhabits in the vicinity of coral reefs, as a solitary fish, grouper will only swim in groups during the breeding season. This fish also has the ability to change sex, first maturing as a female and then changing to a male after a year of breeding.

4, mahi-mahi

Mahi-mahi, also known as salmon, is a cold-water anadromous spawning migratory fish, which is mainly found in the northern part of the Pacific Ocean and the Arctic Ocean. The fish is about 60 centimeters long and migrates during the breeding season and stops feeding when it enters freshwater basins.

5, tuna

Tuna is a large pelagic commercial food fish, known as tuna in Hong Kong, Macao to the Portuguese language known as Yadong fish. Tuna is mainly distributed in the Indian Ocean, the middle of the Pacific Ocean and the middle of the Atlantic Ocean, belonging to the tropical and subtropical oceanic fish. There are eight species of tuna, most of which are huge, the largest body length of up to 3.5 meters, weighing 600-700 kg, the smallest species of only 3 kg weight.