7 Most Common Types Of Fish In The World

7 most common types of fish in the world

Photo by Alex Rose on Unsplash

Fishes are cold-blood vertebrate animals find in fresh and saltwater. There are different types of fish in the world. Species range from the primitive, jawless lampreys and hagfishes through the cartilaginous sharks, skates, and rays to the various bony fishes.

Here is a list of 7 most common types of fish in the world:

1. Sharks

Introduction :

Sharks rank at number 1 in the list of 7 most common types of fish in the world. Shark, individual from a gathering of only marine and predaceous fishes. There are around 250 sorts of sharks, going from the 2-ft (60-cm) dwarf shark to 50-ft (15-m) goliaths. Shark meat is nutritious and is employed for human food. It's is likewise sold for poultry feed, and shark oils are utilized in the industry. Shark oil was a while ago utilized as a wellspring of nutrient A.

Characteristics :

Sharks are many fishes, having neither lungs nor swim bladders. their skeletons are made from ligament rather than bone, and this, alongside huge stores of fat. Most sharks should maintain occupation control to inhale and to stay above water. They need respiratory organs called gills, generally five on all sides, with singular gill cuts opening on the body surface. These cuts structure a prominent line and don't have the covering found over the gills of hard fishes. Sharks inhale by taking water in through the mouth and disregarding out the gills.

Classification :

Sharks, beams (counting skates), and delusions together structure the vertebrate Chondrichthyes, the cartilaginous fishes.

2. Goldfish

Introduction :

Goldfish rank at number 2 in the list of 7 most common types of fish in the world. The common goldfish is native to China and other areas of the Far East, like Japan and Korea. The earliest recorded instance of raising goldfish in captivity was in 970 AD. The goldfish has been introduced to areas all around the world by fish enthusiasts. Goldfish were first delivered to us within the early part of the seventeenth century, and that they were released into the wild by settlers who wished to form goldfish a the neighborhood of the native wildlife.

Characteristics:

The Goldfish breeds vary in size, fin configuration, body shape, and coloration. Goldfish body coloration is various combinations of white, orange, yellow, brown, red, and black.
The wild populations vary in color from gold to green or creamy white. they have an elongated, stocky body and not all individuals have the well-known bright gold color.

Classification :

Goldfish are classified within the Chordata, Vertebrata, class Actinopterygii, Cypriniformes, Cyprinidae.

3. Tuna

Introduction :

Tuna rank at number 3 among the 7 most common types of fish in the world. Tuna also called a tunny fish. It may be seafood that belongs to the tribe Thunnini, which is a subgroup of the Scombridae (mackerel) family. The Thunnini comprises 15 species across five genera, the sizes of which vary, starting from the bullet tuna (max. length: 50 cm (1.6 ft), weight: 1.8 kg (4 lb) up to the Atlantic bluefin tuna (max. length: 4.6 m (15 ft), weight: 684 kg (1,508 lb).

Characteristics:

Tuna are remarkable and impressive wild animals. Tuna can reach ten feet long and weigh the largest amount as 2000 pounds (more than a horse). Their specialized body shape, fins, and scales enable some species of tuna to swim as fast as 43 miles per hour. Tuna swim incredible distances as they migrate.

Classification :

The Thunnus is further classified into two subgenera: (Thunnus) (the bluefin group), and Thunnus (Neothunnus) (the yellowfin group).

4. Swordfish

Introduction :

Swordfish (Xiphias gladius), also known as broadbills in some countries. They are large, migratory, and predatory fishes. Swordfish are elongate, round-body, and lose all teeth and scales by adulthood. These fish are found in tropical and temperate parts of the Atlantic, Pacific, and Indian Oceans, and maybe find from near the surface to a depth of 550 m (1,800 ft), and up to depths of two,234 m. They reach 3 m (9.8 ft) long, and thus the largest reported is 4.55 m (14.9 ft) long and 650 kg (1,430 lb) in weight. They are the only member of their family, Xiphiidae.

Characteristics:

The swordfish features a long body with large round eyes to start out. it's two opposing fins, one crescent-shaped and one rigid like the rudder on a ship. it's a broad, crescent-shaped tail, alongside fin-like membranes lining abreast of the upright part of the spine from the tail to the top of the swordfish. Its snout (the sword) protrudes as a 3rd of its body's length. The swordfish is often found in a big variety of colors from a brownish color to a greyish-bluish color. The belly of the swordfish is a tinted silvery-white coat.
The swordfish has an incredible physique weighing a mean of inbetween198 and 330 pounds. Larger versions of the swordfish are catch; one within the North Atlantic at 1210 pounds, alongside many other larger swordfishes. These larger swordfishes are approximately twenty-six feet long, with almost ten feet of bodies and sixteen feet of swords.

Classifications:

Swordfish are classified within the Chordata, Vertebrata, class Actinopterygii, Perciformes, Xiphiidae.

5. Catfish

Introduction:

Catfish, a common name applied to members of the fish families constituting the Siluriformes, is found in fresh and coastal waters. Catfish are named for the barbels (whiskers) around their mouths and have scaleless skins, fleshy, rayless posterior fins, and sharp defensive spines within the shoulder and dorsal fins. They're ready to use the air bladder to supply sounds and have a posh set of bones forming a sensitive hearing apparatus. Some species, like the stone and tadpole catfishes and thus the madtom, can inflict stings using poison glands within the pectoral spines. Members of most madtom species are not quite 5 in. (12.7 cm) long; some are but 2 in. (5 cm) long. Danube catfish called wels, or sheatfish, reach a length of 13 ft (4 m) and a weight of 400 lb (180 kg), and thus the Mekong giant catfish can reach 10 ft (3 m) and 550 lb (250 kg). Catfish are omnivorous feeders and are valuable scavengers.

Characteristics:

A catfish is distinguished from other species of fish due to its smooth, scaleless body. The channel cat is olive to light blue with black speckles on the edges, features a forked tail, whisker-like organs around the mouth, a broad flat head, and a slender body.

Classification:

Catfishes are classified within the Chordata, Vertebrata, class Actinopterygii, Siluriformes.

6. Rays

Introduction:

Ray, a flat-bodied cartilaginous marine fish, is associated with the shark. The pectoral fins of most rays are developed into broad, flat, winglike appendages, attach right along the edges of the head; the animal swims by rippling movements of those wings. Most rays have slender winglike tails. The eyes and spiracles are located on top of the top, the mouth and thus the gill slits on the underside. Many rays are bottom dwellers, lying like rugs on the seafloor; others inhabit the upper waters. Bottom-dwelling rays breathe by taking in water through the spiracles, instead of through the mouth as most fishes do and spending it out through the gills. Rays prey on a spread of smaller animals; the heavy, round teeth of most species are adapted to crushing the shells of snails and clams.

Characteristics :

The electric rays have smooth and naked skin; the top and trunk with the pectoral fins form a circular disk, and so the tail is brief and stout. About 20 species are known to inhabit warm seas, with some weight of 200 pounds (90 kg).

Classifications:

Rays are classified within the Chordata, Vertebrata, Chondrichthyes, Elasmobranchii, order Batoidea.

7. Lampreys

Introduction :

lamprey, a name for several primitive marines and freshwater jawless fishes of the order Petromyzontiformes. As within the other jawless vertebrate, the hagfish, the adult lamprey retains the notochord, the structure that in higher vertebrates is found only within the embryo. An ancient fish that also resembles fossils that are 360 million years old, the lamprey lacks a sympathetic systema nervosum, a spleen, and scales.

Characteristics:

lampreys have an entire braincase and rudimentary true vertebrae. among living vertebrates, lampreys even have one "nostril" on the dorsal side of the top a feature they share with various fossil jawless vertebrates, which had an identical opening.

Classification:

Lampreys are classified within the Chordata, Vertebrata, class Hyperoartia, order Petromyzontiformes.