Thou lobe-finned fish, good sir.
Chordates are not vertebrates because although some vertebrates are chordates theres many reasons why chordates arent vertebrates.the first reason is because chordates consist of a notochord or a dorsal nerve.
Bottom of the ocean
First off, a Chordate is anything with a Notochord, aka, a spinal column. So, of course, all vertebrae are Chordates. But also nearly any animal that has an endoskeleton, be it bony or cartilaginous. So sharks are also chordates as are most fish.
Neither are protostomes. Chordates, Hemichordates, and Echinoderms are all deuterostomes (in that the blastopore forms the anus first). In protostomes, the blastopore forms the mouth first.
Three key adaptations were needed for chordates to transition from living in water to living on land: development of lungs for breathing air, evolution of limbs for moving and supporting body weight on land, and changes in reproductive strategies to prevent desiccation of eggs.
Chordates are the common ancestors of fish and sharks. They include lampreys and other types of primitive fish species that live in the sea.
Amphibians have a dual life, meaning they go through both aquatic and terrestrial stages during their life cycle. They typically start as larvae in water, undergoing metamorphosis to become adults that live on land.
Amphibia .
all vertebrates are chordates because vertebrates are the sub- group of phylum chordates and also it follow one of the important feature of the chordates i.e. presence of notochord whereas all chordates are not vertebrates because some chordates are cephalochordates, urochordates.
There isn't a "popular name" for them. The most familiar chordates are the vertebrates, but not all chordates are vertebrates (tunicates, for example, are chordates).
All chordates are deuterostomes, meaning that in all chordates, the anus develops first during embryological development. All chordates are bilaterally symmetric. Most chordates have a complete digestive tract, and a body cavity. Note: not all chordates have these features, but it is believed that their absence in some chordates is secondary. All chordates are of course animals and eukaryotes.
Chordates can be found in a variety of habitats, including terrestrial, aquatic, and aerial environments. They are present in oceans, freshwater bodies, and on land. Chordates have successfully adapted to diverse habitats worldwide.