Features of Fish: What Is a Fish?

The video explores vertebrates, a group of animals with backbones, and their classification within the phylum Chordata. It highlights the shared characteristics of chordates, such as a dorsal hollow nerve cord and a notochord. The video also delves into the structure of vertebrates, including their spinal column and vertebrae. It further examines the distinct classes of vertebrates, focusing on fishes, their adaptations for aquatic life, and their ectothermic nature.

What are the four main characteristics that all chordates share at some point in their lives?

How do the gill slits in human development change as the organism matures?

What is the significance of the internal skeleton, or endoskeleton, in chordates?

What distinguishes vertebrates from other chordates?

In what ways are fishes adapted for living in water?