Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, cartilaginous and bony fish, and various extinct related groups. 

Many species of fish are consumed as food in virtually all regions around the world. Fish has been an important source of protein and other nutrients for humans throughout history.

Over 32,000 species of fish have been described making them the most diverse group of vertebrates. In addition, there are many species of shellfish. However, only a small number of species are commonly eaten by humans.

Fish can be prepared in a variety of ways. It can be uncooked (raw). It can be cured by marinating, pickling, or smoking. Or it can be cooked by baking, frying, grilling, poaching, or steaming. Many of the preservation techniques used in different cultures have since become unnecessary but are still performed for their resulting taste and texture when consumed.

Shellfish

Shellfish is a colloquial and fisheries term for exoskeleton-bearing aquatic invertebrates used as food, including various species of mollusks, crustaceans, and echinoderms. 

Although most kinds of shellfish are harvested from saltwater environments, some are found in freshwater. Shellfish are among the most common food allergens.

Types of Fish I

Many species of fish are consumed as food in virtually all regions around the world. Fish has been an important source of protein and other nutrients for humans throughout history.

Over 32,000 species of fish have been described making them the most diverse group of vertebrates. In addition, there are many species of shellfish. However, only a small number of species are commonly eaten by humans.

Types of Fish II

Many species of fish are consumed as food in virtually all regions around the world. Fish has been an important source of protein and other nutrients for humans throughout history.

Over 32,000 species of fish have been described making them the most diverse group of vertebrates. In addition, there are many species of shellfish. However, only a small number of species are commonly eaten by humans.