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How are fish caught at sea?

A trailer picks up logs from trees that have been felledPeople have been catching fish from the sea, rivers and lakes for thousands of years. Fishing is still a source of food, and an important industry for many people living near the sea. Most fish are now caught by fleets using modern equipment. This is called commercial fishing. There are about 30,000 kinds of fish, but only a few hundred are caught commercially. The world’s major fishing grounds are the areas of relatively shallow waters near the coast.


The bluefin tuna is very important to the commercial fishing industry. A large, fast-swimming fish, it measures up to 4 metres...Read More >>The bluefin tuna is very important to the commercial fishing industry. A large, fast-swimming fish, it measures up to 4 metres (13 feet) in length and weighs more than 500 kilograms (1100 pounds). It swims in large shoals in the North Atlantic Ocean. It is fished using purse seine nets. Stocks are now very low.

A modern trawler

Trawlers

Most sea fish are caught by fishermen working on trawlers. Trawlers are equipped with a large net that is trawled (dragged) along or just above the seabed. Many trawlers have freezers so the fish can be gutted and frozen on board. Trawlers are used to catch cod and tuna in deep waters. They also catch fish that live in the waters close to shore, such as haddock, plaice, sole and turbot.

Herring is the most widely eaten fish in the world: more than 10 million tonnes are consumed every year.

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