NEET BIOLOGY

Detailed explanation-1: -Endoskeleton is an internal skeleton present in the bony or cartilaginous fishes . The cartilaginous fish’s endoskeleton is composed of cartilage. The bony fish’s endoskeleton is mainly of bones. Cartilaginous fish come under the class Chondrichthyes and all bony fish under the class Osteichthyes.

Detailed explanation-2: -Class Osteichthyes includes all bony fishes. Like all fishes, Osteichthyes are cold-blooded vertebrates that breathe through gills and use fins for swimming. Bony fishes share several distinguishing features: a skeleton of bone, scales, paired fins, one pair of gill openings, jaws, and paired nostrils.

Detailed explanation-3: -Osteichthyes is a class of jawed fishes having a bony endoskeleton. It is the largest class of vertebrates and includes a diverse group of marine and freshwater bony fishes. The other group of jawed fishes are cartilaginous fishes, which are included in the class Chondrichthyes.

Detailed explanation-4: -Tropical reef clown fish, freshwater eels, pelagic swordfish, deep water anglerfish, and river dwelling catfish are all examples of fish in the class Osteichthyes.

Detailed explanation-5: -bony fish, (superclass Osteichthyes), 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.