Grass carp: Grass carp is the largest aquaculture fish in the world, with an annual commercial catch of 502,8661ton. This kind of fish lives in fresh water and is a herbivore. Originated in eastern Asia and northern Vietnam, located in amur river at the junction of Siberia and China. This kind of fish is relatively large and has been introduced to Europe and America to control aquatic weeds. It can tolerate a wide temperature range, breeding and laying eggs in the temperature range of 68 to 86 degrees Fahrenheit. China is the main producer of grass carp. It is widely favored in aquaculture because it grows rapidly and needs relatively little protein.

Peruvian anchovy Peruvian anchovy is a kind of fish native to the southeast Pacific Ocean. It is the second most common fish in the world, with an annual catch ranging from 4.2 million tons to 8.3 million tons. This kind of fish is one of the most developed fish in the world, and the maximum catch of 197 1 year is 1365438+ 10,000 tons. However, its number has been declining for several years, mainly due to overfishing.

Silver carp: Also called flying fish, it is invasive in some countries. The source of this fish is East Siberia and China, and it is one of the highly fished fish, with an annual commercial catch of 4.2 million tons. The average length of this fish can reach 24 to 39 inches, and the longest can reach 55 inches. It can weigh 1 10 pounds. This fish has no stomach. They mainly feed on phytoplankton. They also eat debris and zooplankton.

carp

Alaska cod

Nile tilapia

Shrimp fish

Carp with big head

Albacore tuna

Palma fishbone

Overfishing, fish has played an important role in human culture since ancient times. As religious symbols and gods, they have become the theme of movies and books. Over-fishing has been a major problem for some time. In fact, if the current fishing rate continues, there will probably be no fish in the world in the future. According to some data, almost 90% of the fish in the world are either overfished or completely fished. According to the FAO report, due to strong demand, the per capita consumption of fish in the world is at an all-time high, with 44 pounds of fish per capita per year, compared with 22 pounds per capita in the 1960s. In the Black Sea and Mediterranean Sea, 59% of fish resources are caught under unsustainable conditions. In addition, due to the impact of climate change on local fish, invasive fish have appeared in this area.