Types of fish in the world

 There are three main types of fish: saltwater fish freshwater fish and brackish water fish. Saltwater fish live in oceans and have gills that extract oxygen from the water. Freshwater fish live in rivers and lakes and have gills that extract oxygen from the water. Brackish water fish live in estuaries and have a mixture of fresh and salt water.

types of fish in the world

There are many different types of fish in the world. Some of the most common include:

• Salmon – a popular type of fish that is often found in rivers and oceans. It is pinkish-orange in color and has a high fat content.

• Tuna – a large saltwater fish that is often canned and used in sandwiches. It is dark blue in color and has a very high fat content.

• Cod – a whitefish that is commonly found in cold waters. It has a mild flavor and a flaky texture.

• Sardines – small oily fish that are often canned and used as a source of protein. They are silver in color and have a strong flavor.

biggest types of fish in the world

The biggest fish in the world is the whale shark. It can grow to a massive 60 feet in length and can weigh up to 21.5 tons. The second biggest fish is the basking shark which can reach lengths of 46 feet and weigh up to 7 tons. 

The third biggest fish is the tiger shark which can grow to be up to 20 feet long and weigh over 1 ton.

how many types of fish in the world

There are over 32,000 species of fish in the world split into three main groups: jawless fish cartilaginous fish and bony fish. Jawless fish are the simplest and most ancient group of fish represented today by lampreys and hagfish. 

Cartilaginous fish include sharks rays and skates – they have a skeleton made of cartilage rather than bone. Bony fish are by far the largest group and include freshwater and saltwater species such as tuna carp eels and salmon.