Question

Information About bony fish​

Answer 1

Answer:

Bony fish, any member of the superclass Osteichthyes, a group made up of the classes Sarcopterygii (lobe-finned fishes) and Actinopterygii (ray-finned fishes) in the subphylum Vertebrata, including the great majority of living fishes and virtually all the world’s sport and commercial fishes. The scientific term Pisces has also been used to identify this group of fishes. Osteichthyes excludes the jawless fishes of the class Agnatha (hagfishes and lampreys) and the cartilaginous fishes constituting the class Chondrichthyes (sharks, skates, and rays) but includes the 20,000 species and more than 400 families of modern bony fishes (infraclass Teleostei) of the world, as well as a few primitive forms. The primary characteristic of bony fishes is a skeleton at least partly composed of true bone (as opposed to cartilage). Other features include, in most forms, the presence of a swim bladder (an air-filled sac to give buoyancy), gill covers over the gill chamber, bony platelike scales, a skull with sutures, and external fertilization of eggs.

Answer 2

|Bony fish|

• It possesses a vertebral column and belongs to
• Phylum: Chordata
• Sub-Phylum: Vertebrata
• Class: Osteischthyes -- Bony fish, body is spindle shape, covered with scales and respiration by gills.

|Features of phylum|

1. Mouth is terminal, body is spindle shaped, strong vertebral column.
2. It has bony endoskeleton.
3. Gills covered by an Operculum for respiration.
4. Air-bladder present which helps in giving buoyancy and float/swim in water.
5. Dorsal and pelvic fins helps in balancing and movement in water and change directions.

|Adaptive Features|

• The body is streamlined which helps in swimming.
• Fins are present (Dorsal, pelvic, pectoral, and tail fins) for locomotion, balancing, and changing directions.
• Body is covered with scaled to protect against water decay.
• Gills covered by Operculum for respiration.