Types of Bony Fish




Types of Bony FishSome species can easily reach tremendous sizes, much larger than a human.

The longest bony fish is the oarfish, which can reach 11 m (36 ft.).

One of the heaviest of the bony fishes is the normal ocean sunfish, which lives throughout warm and temperate seas globally. A large sunfish can reach 2,300 kg (5,071 lb.) and 3.3 m (10.8 ft.).

Numerous sturgeons grow huge. The biggest is the beluga sturgeon, which inhabits the Black, Caspian and Adriatic Seas and can reach 5 m (16.4 ft.) and 2,000 kg (4,409 lb.).

Black marlin reach 4.7 m (15.4 ft.) and 750 kg (1,653 lb.).

The European wels catfish reaches 5 m (16.4 ft.) and around 300 kg (661 lb.).

Many species of bony fishes are protected by and covered with a layer of plates known as scales.

There are four different kinds of bony fish scales: ganoid, cosmoid, ctenoid and cycloid.

Characteristics of Bony Fish

The main characteristic of bony fishes is actually a skeleton a minimum of partly made up of true bone (as opposed to cartilage). Other characteristics include, in most forms, the existence of a swim bladder (an air-filled sac to give buoyancy), gill covers over the bony platelike scales, gill chamber, a skull with sutures and exterior fertilization of eggs.

Bony fishes take place in all freshwater and ocean environments, such as deep-sea habitats, caves and thermal springs and vents. The range of shapes and behavioral habits is amazing. Their body sizes vary from tiny species such as the pygmy goby (Pandaka pygmaea; 12 mm [0.5 inch]) to the massive marlins and swordfishes (family Istiophoridae) with lengths around 4.5 m (15 feet) and the ocean sunfish (Mola mola), which may weigh above 900 kg (1 ton). 

Bony Fish Facts

Bony fish are fishes who have a skeleton made from bone and warasses, perches, tunas, barracudas, mackerels and freshwater bass. They are the most diverse and numerous of most vertebrates with more than 20,000 species of salt and fresh water bony fish.

They have teeth that are set onto the upper jaw. They have a swim bladder (an air filled sac that assists them with buoyancy) that opens into the gullet. Bony fish do not need to swim to breathe (to push water via the gills). Bony fish are covered in scales and they have gills on the sides of their heads. Many fishes are a bony fish. Skates, sharks and rays are not a bony fish.



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