because
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).
It is a kind of starfish which has a granular texture and thus appears to be coated with sugar. They tend to be brown to orange in color and depite the name are not considered edible. They are the kind of starfish people most often associate with the name "starfish"
lancelets
adult tunicate
Yes, most chordates are vertebrates.
Because of their complex organs, circularitory systems, nervous systems, and gas exchange systems.
common starfish
Well, no they don't... There's a group of chordates called Agnatha which basically contains all the jawless chordates. And there are obviously limbless chordates present, the fishes and the snakes being the most well-known of the examples...
Vertebrates are a subgroup of the chordates, meaning that all vertebrates are chordates, but not all chordates are vertebrates. Vertebrates are distinguished from other chordates by having backbones or spinal columns.All vertebrates have muscular systems that mostly consist of paired masses, as well as a central nervous system which is partly located inside the backbone (if one is present). The defining characteristic of a vertebrate is considered the backbone or spinal cord, a brain case, and an internal skeleton, but the latter is not true for lampreys, and the former is arguably present in some other chordates. Rather, all vertebrates are most easily distinguished from all other chordates by having a clearly identifiable head. Sensory organs--especially eyes--are concentrated at the foreend of the body, and there is pronounced cephalization.
bilateral symmetry
Most if not all starfish are carnivores.It is a carnivore.
Starfishes are omnivores because they eat both meat and producers.