NEET BIOLOGY

Detailed explanation-1: -A fish is an aquatic vertebrate with scales, fins, and gills. About 32, 000 fish species are known, divided into jawless fishes (agnathans), cartilaginous fishes (chondrichthyans), and bony fishes (osteichthyans).

Detailed explanation-2: -Fish and Other Aquatic Vertebrates are members of the subphylum Vertebrata who spend the majority of their lives in freshwater, marine, or estuarine environments.

Detailed explanation-3: -Marine vertebrates are vertebrates that live in marine environments. These are the marine fish and the marine tetrapods (primarily seabirds, marine reptiles, and marine mammals). Vertebrates are a subphylum of chordates that have a vertebral column (backbone).

Detailed explanation-4: -Amphibians are small vertebrates that need water, or a moist environment, to survive. The species in this group include frogs, toads, salamanders, and newts.

Detailed explanation-5: -All fish share two traits: they live in water and they have a backbone-they are vertebrates.